Bitnodes estimates the relative size of the Bitcoin peer-to-peer network by finding all of its reachable nodes.


ASN HEALTH

This page reports network health data for reachable ASNs, which are ASNs that have at least one reachable IPv4/IPv6 Bitcoin node. Data points are collected whenever a new network snapshot is available, which occurs approximately every 10 minutes. BGP alerts are promptly displayed within 10 seconds of detection and will be automatically cleared after 1 hour if they are not persistent.

Each autonomous system (AS) is associated with a unique autonomous system number (ASN) and consists of a group of IP prefixes that fall under the control of a single administrative entity, such as an Internet Service Provider (ISP). ASNs are crucial for determining the most efficient routes for network traffic using Border Gateway Protocol (BGP), which enables the Internet to operate as a global, interconnected network.

A diverse range of ASNs is essential for the Bitcoin peer-to-peer network to maintain its decentralized nature, a key characteristic that sets it apart from traditional financial systems. This diversity also enhances the network's resiliency against potential threats, making it more difficult for bad actors to disrupt the network by targeting a single point of weakness.

Page is updated automatically on new snapshot. Time since last snapshot: 0s


NODESCOUNTRY
UPTIME 50%LATENCY 50%
FULL NODESPRUNED NODES
IPV4 NODESIPV6 NODES
IPV4 ROA %IPV6 ROA %
AS6939 ADJACENT PEERSHetzner Online GmbH (AS213230), FIBERSTATE (AS26042), Deutsche Telekom AG (AS3320), COGECOWAVE (AS7992), SH.cz s.r.o. (AS39392), Ellinika Diktia Kalodion Mepe (AS57794), Vivacom Bulgaria EAD (AS8866), JSC Selectel (AS49505), Fonira Telekom GmbH (AS51184), RCN-AS (AS6079), UK-2 Limited (AS13213), TWC-10796-MIDWEST (AS10796), Techtel LMDS Comunicaciones Interactivas S.A. (AS11664), PLANET INTERNET (AS264906), TalkTalk (AS13285), Lit Fibre Group Ltd. (AS211597), Partner Communications Ltd. (AS12400), Tiscali SpA (AS8612), WIZ K.K. (AS54415), M-net Telekommunikations GmbH (AS8767), CIPHERKEY (AS25668), IS-AS-1 (AS19318), Privex Inc. (AS210083), AUREON-5056 (AS5056), JSC Selectel (AS50340), CETIN Ltd. Belgrade (AS15958), NAMECHEAP-NET (AS22612), Seflow s.r.l. (AS49367), IOFLOOD (AS53755), 702COM (AS15267), One New Zealand Group Limited (AS9500), Netia SA (AS12741), velia.net Internetdienste GmbH (AS29066), GOOGLE (AS15169), HVC-AS (AS29802), Administracion Nacional de Telecomunicaciones (AS6057), Enreach Netherlands B.V. (AS39647), AS-GLOBALTELEHOST (AS63023), GCI (AS8047), Eir Broadband (AS5466), BACOM (AS577), AS-COPR (AS395075), NEBULA (AS140224), Sky UK Limited (AS5607), Datacamp Limited (AS60068), Aeza International Ltd (AS210644), Hetzner Online GmbH (AS212317), Nova hf (AS44735), Gigaclear Limited (AS56329), SkyNet Ltd. (AS35807), Internet Thailand Company Limited (AS4618), BIZNET NETWORKS (AS17451), EDPNET Belgium BV (AS9031), Belcloud LTD (AS44901), Community Fibre Limited (AS201838), RVT SERVICOS DE TELECOMUNICACOES LTDA (AS268207), GLBB Japan KK (AS55900), CC-3272 (AS11290), Emirates Telecommunications Group Company (etisalat Group) Pjsc (AS8966), Sky Italia srl (AS210278), Hollander & Jacobsen UG (haftungsbeschraenkt) (AS206075), SERVERROOM (AS19624), Vodafone Italia S.p.A. (AS30722), Scientific-Production Enterprise Information Technologies Ltd (AS48239), Byteplus Pte. Ltd. (AS150436), Virtual Systems LLC (AS30860), Sat-Trakt D.O.O. (AS41897), HAL Service SpA (AS44092), eHAMnet, s.r.o. (AS44712), Andorra Telecom, S.a.u. (AS6752), CASABLANCA INT a.s. (AS15685), WIA spol. s.r.o. (AS21430), ISPpro Internet KG (AS35366), Serverel Inc. (AS50245), Fiber Operator B.V. (AS207375), Asahi Net (AS4685), OVH SAS (AS16276), Moldtelecom SA (AS8926), T-2, d.o.o. (AS34779), HUB66 (AS395510), NTT PC Communications, Inc. (AS2514), Quantcom, a.s. (AS29208), MULTIB-40788 (AS40788), Infinity Developments Limited (AS12496), Information and Communication Technologies LLC (AS35539), Gigabit Hosting Sdn Bhd (AS55720), RENET COM Ltd. (AS30936), GOOGLE-FIBER (AS16591), PONYNET (AS53667), TIME dotCom Berhad No. 14, Jalan Majistret U126 Hicom Glenmarie Industrial Park 40150 Shah Al (AS9930), FRONTIER-FRTR (AS5650), UUNET (AS701), AS-EFTL (AS35847), VANILLA (AS37199), JSC Kazakhtelecom (AS9198), GlobalConnect AB (AS12552), UAB Cherry Servers (AS16125), TELEKOM SRBIJA a.d. (AS8400), RELIABLESITE (AS23470), NEXICOM (AS11666), Keyweb AG (AS31103), Datasource AG (AS51395), Trooli Ltd. (AS48101), SoftBank Corp. (AS17676), BAI-IP-SERVICES (AS23316), Blix Solutions AS (AS50304), HOSTKEY-USA (AS395839), Stream Networks Ltd (AS198736), Orange Belgium SA (AS47377), Scaleway S.a.s. (AS12876), Scalaxy B.V. (AS58061), dataforest GmbH (AS58212), MULTA-ASN1 (AS35916), EASTLINK-HSI (AS11260), HBCI-1999TA (AS14828), CHARTER-20115 (AS20115), HUAWEI CLOUDS (AS136907), Mammoth Media Pty Ltd (AS133159), ITSOFT LLC (AS48614), Colombia (AS19429), Vodafone GmbH (AS3209), MANAGEDNETWORK (AS7057), Genossenschaft GGA Maur (AS21232), NEXEON (AS20278), POST Luxembourg (AS6661), TPG Telecom Limited (AS7545), Aixit GmbH (AS29551), CORESITE (AS2734), AO Tele-Service Tula (AS35401), Gigahost AS (AS56655), CABLEONE (AS11492), AS-GLOBALTELEHOST (AS62563), Coolhousing s.r.o. (AS35592), OZARKSGO (AS395662), Neterra Ltd. (AS34224), EDGEUNO S.A.S (AS7195), FUSE-NET (AS6181), WINDSTREAM (AS7029), TNG Stadtnetz GmbH (AS13101), WAIcore Ltd (AS213887), Kabel-TV Lampert GmbH & Co KG (AS59890), AS62943-BLUEBIRD-NETWORK (AS62943), Vectra S.A. (AS29314), Mega Cable, S.A. de C.V. (AS13999), SilesNet s.r.o. (AS43709), PRECISION-DATA-SOLUTIONS (AS11142), Ooredoo Q.S.C. (AS8781), SOLLUTIUM EU Sp z.o.o. (AS43641), IQWeb FZ-LLC (AS59692), TM TECHNOLOGY SERVICES SDN. BHD. (AS4788), JSC IOT (AS29182), Fibre Assets Ltd (AS205975), Proton AG (AS62371), Tube-Hosting (AS49581), Akamai Connected Cloud (AS63949), VNPT Corp (AS45899), TDC Holding A/S (AS3292), Rostelecom (AS12389), Doyle (North West) Ltd. (AS207586), WOW-INTERNET (AS12083), MivoCloud SRL (AS39798), Magyar Telekom Plc. (AS5483), oneCorp GmbH (AS204035), IONOS SE (AS8560), EWII Bredbaand A/S (AS204151), 31173 Services AB (AS39351), Bluewin (AS3303), Vodafone Limited (AS5378), TELMAX-INC (AS394710), 3W Infra B.V. (AS60144), Trabia SRL (AS43289), ATT-INTERNET4 (AS7018), Emirates Integrated Telecommunications Company PJSC (AS15802), Latitude.sh LTDA (AS262287), UK Dedicated Servers Limited (AS42831), Cgi Global Limited (AS56971), Telia Lietuva, AB (AS8764), AS40676 (AS40676), Vodafone Portugal - Communicacoes Pessoais S.A. (AS12353), Republican Unitary Telecommunication Enterprise Beltelecom (AS6697), EWE-Tel GmbH (AS9145), RINCON-WIRELESS (AS36527), GTCOMM (AS36666), MasterDC s.r.o. (AS24971), PC Astra-net (AS49824), TwentyWAN MB (AS210000), Multinet24 Sp.zoo (AS197099), Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. (AS680), Zen Internet Ltd (AS13037), The Infrastructure Group B.V. (AS60404), AS17378 (AS17378), EBOX (AS1403), AS-WHOLESAIL (AS20055), Hostinger International Limited (AS47583), Slovak Telekom, a.s. (AS6855), PC-MANIACS (AS327960), HIVE-DATA-CENTER (AS33185), FASTER CZ spol. s r.o. (AS24641), Yandex.Cloud LLC (AS200350), Xtra Telecom S.A. (AS15704), Aeza Group LLC (AS216246), Cyprus Telecommunications Authority (AS6866), Etlgr LLC (AS212947), ANTIK Telecom s.r.o (AS42841), Spitfire Network Services Limited (AS16082), SUDDENLINK-COMMUNICATIONS (AS19108), Hong Kong Broadband Network Ltd. (AS9269), Teleradiocompany Discovery Ltd. (AS47702), Superloop (AS38195), Netversor GmbH (AS200081), NetAssist LLC (AS8772), MEVSPACE sp. z o.o. (AS201814), Contabo Asia Private Limited (AS141995), SonderCloud Limited (AS133199), xTom Japan Corporation (AS3258), DALTON-UTILITIES-OPTILINK (AS30165), Iomart Cloud Services Limited (AS20860), Vodafone Spain (AS12430), USINTERNET (AS10242), Korea Telecom (AS4766), VIASAT-SP-BACKBONE (AS7155), IX-layers, Inc. (AS151374), DELTA Fiber Nederland B.V. (AS15435), DIGI Tavkozlesi es Szolgaltato Kft. (AS20845), IT7NET (AS25820), HZ Hosting Ltd (AS59711), Nova Telecommunications & Media Single Member S.A (AS1241), Orange Slovensko a.s. (AS15962), 1&1 Versatel Deutschland GmbH (AS8881), Inovare-Prim SRL (AS60602), ServerHouse Ltd (AS21472), AS-VULTR (AS20473), Andrews & Arnold Ltd (AS20712), Atomdata Jsc (AS199860), myNet GmbH (AS31543), MTS PJSC (AS8359), ropa GmbH (AS197637), Greenhost BV (AS47172), Aussie Broadband (AS4764), Virtual Systems LLC (AS6698), Nte Telekom As (AS34087), I3BROADBAND (AS12119), Hrvatski Telekom d.d. (AS5391), Occom Pty Ltd (AS135126), Association Gitoyen (AS20766), Lyse Tele (AS29695), EXECULINK (AS7794), TimeWeb Ltd. (AS9123), HUNTER-COMM (AS36012), SK Broadband Co Ltd (AS9318), Daisy Corporate Services Trading Ltd (AS5413), INDOSAT Internet Network Provider (AS4761), INTERNET MULTIFEED CO. (AS55392), Hohl IT e.U. (AS40994), TELECOM FOZ (AS262567), TEKSAVVY (AS5645), Sunrise GmbH (AS6730), Philippine Long Distance Telephone Company (AS9299), Orange Espagne SA (AS12479), Liberty Global B.V. (AS6830), Cyber Internet Services Pvt Ltd. (AS9541), Aruba S.p.A. (AS31034), LEVEL3 (AS3356), AMAZON-02 (AS16509), Odido Netherlands B.V. (AS50266), CHINA UNICOM China169 Backbone (AS4837), xneelo (AS37153), IW-ASN-11071 (AS11071), HELIACAL (AS26679), Wireline (AS58507), Vodafone-panafon Hellenic Telecommunications Company SA (AS3329), GIGA MAIS FIBRA TELECOMUNICACOES S.A. (AS28210), HOMEWORKS-1 (AS396905), WIIT AG (AS24961), Binariang Berhad (AS9534), ASN-IDK-27425 (AS27425), Telekom Austria (AS8447), LETABANETWORKS (AS328638), JOESDATACENTER (AS19969), Cellcom Fixed Line Communication L.P (AS1680), AXCELX-NET (AS33083), Telemach Slovenija d.o.o. (AS3212), Pulsant (Scotland) Ltd (AS12703), MEDIACOM-ENTERPRISE-BUSINESS (AS30036), GRANDECOM-AS1 (AS7459), Kcom Group Limited (AS12390), PACKET (AS54825), VTR BANDA ANCHA S.A. (AS22047), ASN-CXA-ALL-CCI-22773-RDC (AS22773), AS-OKI (AS397444), SPACEX-STARLINK (AS14593), Aire Networks Del Mediterraneo Sl Unipersonal (AS29119), LG DACOM Corporation (AS3786), PremierDC Veri Merkezi Anonim Sirketi (AS42910), FreeTel, s.r.o. (AS8251), Melbikomas UAB (AS56630), Hetzner Online GmbH (AS24940), Ljosleidarinn ehf (AS12969), Chubu Telecommunications Company, Inc. (AS18126), Servers Tech Fzco (AS216071), WWZ Telekom AG (AS8821), NIKS (AS3267), COMWAVE-BGP-01 (AS15128), INFOSERVIC INFORMATICA TELECOMUNICACAO LTDA (AS263495), ADAMANT, Ltd. (AS8788), MARK-TWAIN (AS10750), Cloud4com s.r.o. (AS201730), TOTAL PLAY TELECOMUNICACIONES SA DE CV (AS17072), CESNET z.s.p.o. (AS2852), DISTRIBUTEL-AS11814 (AS11814), TDS-AS (AS4181), WEDOS Internet, a.s. (AS197019), Init7 (Switzerland) Ltd. (AS13030), kabelplus GmbH (AS8339), Open Infra ISP Production International AB (AS207821), MICROSOFT-CORP-MSN-AS-BLOCK (AS8075), SEMPRE TELECOMUNICACOES LTDA (AS28198), Shinjiru Technology Sdn Bhd (AS45839), Sure (Guernsey) Limited (AS8680), Orange Romania S.A. (AS9050), UAB Rakrejus (AS62282), SOPRADO GmbH (AS20546), aurologic GmbH (AS30823), Adamo Telecom Iberia S.A. (AS35699), TELUS Communications (AS852), LIMESTONENETWORKS (AS46475), IX Reach Ltd (AS4455), green.ch AG (AS1836), CONNECT2FIRST-LLC (AS399331), KPN B.V. (AS1136), Hi3G Access AB (AS44034), Viettel Group (AS7552), STARNET, s.r.o. (AS44489), KDDI CORPORATION (AS2516), Hostkey B.v. (AS57043), IP Volume inc (AS202425), AS-TING-BACKBONE (AS32133), Vivacom Bulgaria EAD (AS43205), EOLO S.p.A. (AS35612), Three (AS206067), PODA a.s. (AS30764), JAW.cz s.r.o. (AS43070), BYTEFILTER-AS (AS1002), Nearoute Limited (AS51847), M247 Europe SRL (AS9009), ASAP-AS (AS328327), Hydra Communications Ltd (AS25369), NSS S.A. (AS16814), Quickline AG (AS15600), Dragon Internet a.s. (AS15614), WorldStream B.V. (AS49981), Visual Online S.A. (AS9008), Telekom Slovenije, d.d. (AS5603), CANACA-210 (AS33139), T-MOBILE-AS21928 (AS21928), AS-WAVE-1 (AS11404), Data Communication Business Group (AS3462), Hosting technology LTD (AS48282), Triple T Broadband Public Company Limited (AS45758), Probe Networks (AS29686), LATITUDE-SH (AS396356), Open Fibre Networks (wholesale) Limited (AS48945), SHAW (AS6327), Hutchison Drei Austria GmbH (AS25255), O2 Czech Republic, a.s. (AS5610), Alibaba US Technology Co., Ltd. (AS45102), Fastweb (AS12874), Newsnet AG (AS198288), Epcan GmbH (AS196954), GTT Communications Inc. (AS3257), MIDCO-NET (AS11232), DIGITALOCEAN-ASN (AS14061), Proximus NV (AS5432), CANET-ASN-4 (AS855), JM-Net, z.s. (AS62099), TWIN-LAKES (AS19331), toob limited (AS60377), MAXXSOUTH-BROADBAND (AS46687), ROGERS-COMMUNICATIONS (AS812), Digi Romania S.A. (AS8708), HOSTODO (AS399804), Clouvider Limited (AS62240), IQ-FIBER (AS400427), ARTERIA Networks Corporation (AS2519), NetCologne Gesellschaft fur Telekommunikation mbH (AS8422), HKT Limited (AS4760), CLDIN B.V. (AS48635), OSNET (AS21559), CABLE-NET-1 (AS6128), WEBPASS (AS19165), ORACLE-BMC-31898 (AS31898), RoyaleHosting BV (AS212477), Spintel Pty Ltd (AS18390), INTERNET-SOLUTIONS (AS20011), Tencent Building, Kejizhongyi Avenue (AS132203), TURNKEY-INTERNET (AS40244), TACH (AS397412), TELEFONICA CHILE S.A. (AS7418), EMPECOM, s.r.o. (AS202605), Vetta Online Ltd (AS64073), Stark Industries Solutions Ltd (AS44477), Telecom Argentina S.A. (AS7303), Telenet BV (AS6848), WII (AS32097), ENZUINC (AS18978), P.a.k.t LLC (AS39087), EMPIRE-40545 (AS40545), Host Universal Pty Ltd (AS136557), UNINET (AS8151), Medianet Invest Ae (AS200736), HRTC (AS11525), FORT-COLLINS-CONNEXION (AS397142), OMNIS (AS19237), Orange Romania S.A. (AS8953), Tele2 SWIPnet (AS1257), TETA s.r.o. (AS50698), MONKEYBRAINS (AS32329), 1GSERVERS (AS14315), InterneXt 2000, s.r.o. (AS25424), TERASWITCH (AS20326), Nos Comunicacoes, S.A. (AS2860), T-Mobile Austria GmbH (AS8412), GANDI SAS (AS29169), Serverius Holding B.V. (AS50673), NForce Entertainment B.V. (AS43350), MAIN Sp. z o.o. (AS205671), Avatel Telecom, SA (AS200845), VIDEOTRON (AS5769), Croatian Academic and Research Network (AS2108), Vodafone Czech Republic a.s. (AS16019), UNIDATA S.p.A. (AS5394), WEBNX (AS18450), Lounea Palvelut Oy (AS39699), Hyperoptic Ltd (AS56478), Retelit Digital Services S.p.A. (AS3302), COMCAST-7922 (AS7922), Sineasen S.l. (AS51681), Content Delivery Network Ltd (AS13188), Two Degrees Networks Limited (AS9790)

TERMINOLOGY

Reachable ASNASN that contains at least 1 reachable Bitcoin node.
Latency 50%50th percentile (median) ping message round-trip time in milliseconds.
Uptime 50%50th percentile (median) uptime in hours from persistent connections.
Block 50%50th percentile (median) latest block inv propagation time in milliseconds.
Height 50%50th percentile (median) block height delta from consensus height.
IPv4 ROA %Percentage of IPv4 nodes covered by ROA (Route Origin Authorization) IPv4 prefixes for the ASN.
IPv6 ROA %Percentage of IPv6 nodes covered by ROA (Route Origin Authorization) IPv6 prefixes for the ASN.
Adjacent peersAdjacent peering ASNs that contain at least 1 reachable Bitcoin node.
BGP alertThis ASN is originating an IP prefix owned by another ASN during the past hour.
BGP alertAnother ASN is originating an IP prefix owned by this ASN during the past hour.


BGP ALERT METHODOLOGY

One threat to the Bitcoin peer-to-peer network's security that is often overlooked is Border Gateway Protocol (BGP) hijacking. In a BGP hijacking attack, an attacker manipulates BGP routes to redirect traffic intended for a Bitcoin node to a malicious node under the attacker's control. This can lead to the interception and manipulation of Bitcoin block or transaction messages, potentially resulting in financial losses. Adding to this risk, Bitcoin traffic is unencrypted by default, making it susceptible to interception and manipulation by attackers who gain access to the network traffic.

BGP hijacking attacks can occur anywhere along the path between a Bitcoin node and its peers, so it is important for Bitcoin node operators to be able to monitor for any suspicious routing changes, both within their own autonomous system (AS) and in the ASes of their peers.


A BGP hijack in the operator's own AS1 (Fig. 1) could redirect traffic away from the legitimate Bitcoin node ₿1 while a hijack in the destination AS2 (Fig. 2) could redirect traffic intended for the Bitcoin node ₿2 to a malicious node under the attacker's control.

To mitigate the risk of BGP hijacking attacks, it is important to have monitoring tools in place that can detect and alert network operators to any unusual routing changes. However, existing monitoring tools may not be suitable for Bitcoin node operators as they are primarily designed for general network operations. Hence, a specialized monitoring tool, such as Bitnodes BGP alert, is necessary in surfacing possible BGP hijacking attacks affecting the Bitcoin network.

Bitnodes uses rpki-client to periodically (hourly) fetch the latest Route Origin Authorizations (ROAs) from each of the five Regional Internet Registries (RIRs), i.e. AFRINIC, APNIC, ARIN, LACNIC, RIPE, and consolidate them into a single JSON file:

{
    "metadata": {.., "buildtime": "2023-01-01T00:00:00Z", ..},
    "roas": [
        {"asn": "AS14061", "prefix": "134.209.0.0/16", "maxLength": 24},
        ..
    ]
}

All IP prefixes from the JSON file are stored in a database and treated as Validated ROA Payload (VRP) for up to 24 hours. Bitnodes uses RIPE Routing Information Service Live (RIS Live) to receive live BGP announcement messages. For each announcement message:

{
    'peer': '27.111.230.35', 'peer_asn': '133210',
    'path': [133210, 9498, 14061],
    'announcements': [{'next_hop': '27.111.228.40', 'prefixes': ['134.209.144.0/20']}], ..
}

Bitnodes queries its VRP database to validate each of the prefixes in the message:

Query outputOutcome
Prefix in the message matches a VRP record. The match can be equal or prefix being more specific with its prefix length no greater than the matching VRP's max. length.VALID
Origin AS in the message did not match the matching VRP record or prefix in the message is more specific than the matching VRP's max. length.INVALID
No matching VRPs.UNKNOWN

If the validation outcome is marked as INVALID, the reachable ASN on the origin AS end will trigger an alert labeled as BGP alert, and the reachable ASN on the VRP's AS end will trigger an alert labeled as BGP alert, for a duration of up to one hour from the time of the last INVALID validation. It is important to note that the presence of these alerts should not automatically be interpreted as indicative of a BGP hijack. They could potentially result from temporary misconfigurations or other benign causes. Additional analysis is almost always warranted, including but not limited to monitoring for anomalous changes in ping latency, block propagation time, or an increase in block height delta from consensus height.


Join the Network

Be part of the Bitcoin network by running a Bitcoin full node, e.g. Bitcoin Core.

Use this tool to check if your Bitcoin client is currently accepting incoming connections from other nodes. Port must be between 1024 and 65535.