Bitnodes is currently being developed to estimate the size of the Bitcoin network by finding all the reachable nodes in the network.

Leaderboard

Reachable nodes ranked according to their Peer Index (PIX) as of Sat Sep 25 17:01:43 2021 EDT. PIX values are calculated only for activated nodes.

Peer Index (PIX)

PIX value is calculated every 24 hours for each activated node based on its properties and network metrics. The value ranges between 0.0 and 10.0 with 10.0 being the most desirable for the Bitcoin network. The formula used to calculate PIX value is described below.

PIX = ((VI + SI + HI + AI + PI + DLI + DUI + WLI + WUI + MLI + MUI + NSI + NI + BI) / 14.0) x 10.0

VI = Protocol version index
    VI = 1 / r
        r = rank of node's protocol version
        Consensus protocol version is ranked 1 followed by the next most common protocol version

SI = Services index
    SI = 1 / r
        r = rank of node's services
        Consensus services is ranked 1 followed by the next most common services
        SI is set to 0.0 for node without NODE_NETWORK

HI = Height index
    HI = h / H
        h = node's latest height
        H = consensus height

AI = ASN index
    AI = ln((1 / n) x N) / ln(N)
        N = number of reachable nodes
        n = number of nodes from N with the same ASN

PI = Port index
    PI = 1.0 for 8333 (default port), 0.0 for other

DLI = Average daily latency index
    DLI = 1.0 for <=  300 ms
          0.9 for <=  400 ms
          0.8 for <=  500 ms
          0.7 for <=  600 ms
          0.6 for <=  700 ms
          0.5 for <=  800 ms
          0.4 for <=  900 ms
          0.3 for <= 1000 ms
          0.2 for <= 1100 ms
          0.1 for <= 1200 ms
          0.0 for  > 1200 ms

DUI = Daily uptime index
    DUI = t / T
        t = number of daily ticks with latency > 0
        T = number of daily ticks
        Tick with latency <= 0 indicates that node is unreachable

WLI = Average weekly latency index
    WLI = 1.0 for <=  300 ms
          0.9 for <=  400 ms
          0.8 for <=  500 ms
          0.7 for <=  600 ms
          0.6 for <=  700 ms
          0.5 for <=  800 ms
          0.4 for <=  900 ms
          0.3 for <= 1000 ms
          0.2 for <= 1100 ms
          0.1 for <= 1200 ms
          0.0 for  > 1200 ms

WUI = Weekly uptime index
    WUI = t / T
        t = number of weekly ticks with latency > 0
        T = number of weekly ticks
        Tick with latency <= 0 indicates that node is unreachable

MLI = Average monthly latency index
    MLI = 1.0 for <=  300 ms
          0.9 for <=  400 ms
          0.8 for <=  500 ms
          0.7 for <=  600 ms
          0.6 for <=  700 ms
          0.5 for <=  800 ms
          0.4 for <=  900 ms
          0.3 for <= 1000 ms
          0.2 for <= 1100 ms
          0.1 for <= 1200 ms
          0.0 for  > 1200 ms

MUI = Monthly uptime index
    MUI = t / T
        t = number of monthly ticks with latency > 0
        T = number of monthly ticks
        Tick with latency <= 0 indicates that node is unreachable

NSI = Network speed index
    NSI = 1.0 for ≈ 99th percentile
          0.9 for ≈ 90th percentile
          0.8 for ≈ 80th percentile
          0.7 for ≈ 70th percentile
          0.6 for ≈ 60th percentile
          0.5 for ≈ 50th percentile
          0.4 for ≈ 40th percentile
          0.3 for ≈ 30th percentile
          0.2 for ≈ 20th percentile
          0.1 for ≈ 10th percentile
          0.0 for < 10th percentile

NI = Nodes index
    NI = (p ∩ N) / N
        p = peers returned in addr responses
        N = reachable nodes
        NI >= 6σ is capped at 99th percentile

BI = Block index
    BI = 1.0 if valid block is returned in response to getdata request, 0.0 if otherwise

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.