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0 sats \ 0 replies \ @DiedOnTitan OP 20 Feb 2024 \ on: Seeds of Consensus: Bitcoin Core DNS Seeds in /src/kernel/chainparams.cpp bitdevs
I went through each of these hostnames, pinging them, then doing a WHOIS lookup to determine the Autonomous System (AS) number, which informs which network the host routes to.
https://m.stacker.news/16852
Ping however will only grab one IP from a list of possible IP Addresses. It turns out that most of these hostnames point to numerous IP addresses. Which makes perfect sense for fault tolerance, geographic dispersion, and redundancy reasons. The next step I listed all IP addresses tied to each seed hostname:
$ dig +short a seed.bitcoin.sipa.be
93.81.254.159
173.241.227.243
5.45.74.50
68.219.242.34
121.226.58.95
136.244.19.126
31.164.160.162
209.204.29.18
51.15.11.99
18.198.16.76
216.82.38.46
92.43.187.34
54.91.248.109
18.217.35.153
31.188.245.244
18.222.149.135
35.205.117.63
37.60.240.209
188.68.53.44
37.60.234.45
73.117.132.138
35.237.144.170
62.24.76.122
109.86.60.33
179.228.234.7
To get a better feel for these IP addresses, I wrote a script to collect various data points on each of these IP addresses. Here is the result of the first hostname:
Hostname              IP Address       Reverse IP
seed.bitcoin.sipa.be  104.62.136.12    104-62-136-12.lightspeed.mssnks.sbcglobal.net
seed.bitcoin.sipa.be  134.122.100.130
seed.bitcoin.sipa.be  108.44.152.24    pool-108-44-152-24.clppva.fios.verizon.net
seed.bitcoin.sipa.be  86.104.228.41
seed.bitcoin.sipa.be  185.231.220.189  swinglicious.com
seed.bitcoin.sipa.be  68.219.242.34
seed.bitcoin.sipa.be  188.166.72.55
seed.bitcoin.sipa.be  65.109.85.139    static.139.85.109.65.clients.your-server.de
seed.bitcoin.sipa.be  109.173.126.157  broadband-109-173-126-157.ip.moscow.rt.ru
seed.bitcoin.sipa.be  195.56.63.11
seed.bitcoin.sipa.be  167.235.110.208  static.208.110.235.167.clients.your-server.de
seed.bitcoin.sipa.be  185.70.43.193    185-70-43-193.protonmail.ch
seed.bitcoin.sipa.be  18.162.156.95    ec2-18-162-156-95.ap-east-1.compute.amazonaws.com
seed.bitcoin.sipa.be  172.234.95.35    172-234-95-35.ip.linodeusercontent.com
seed.bitcoin.sipa.be  69.181.240.40    c-69-181-240-40.hsd1.ca.comcast.net
seed.bitcoin.sipa.be  62.54.183.27
seed.bitcoin.sipa.be  195.201.86.117   static.117.86.201.195.clients.your-server.de
seed.bitcoin.sipa.be  62.210.88.131    23ce2d6f-677d-476e-883f-9d322bdbbc84.fr-par-1.baremetal.scw.cloud
seed.bitcoin.sipa.be  192.95.31.84     ns502652.ip-192-95-31.net
seed.bitcoin.sipa.be  5.253.18.218
seed.bitcoin.sipa.be  71.188.127.21    static-71-188-127-21.cmdnnj.fios.verizon.net
seed.bitcoin.sipa.be  5.189.144.87     m3087.contabo.host
seed.bitcoin.sipa.be  177.170.79.252   177-170-79-252.user.vivozap.com.br
seed.bitcoin.sipa.be  13.228.111.109   ec2-13-228-111-109.ap-southeast-1.compute.amazonaws.com
seed.bitcoin.sipa.be  185.152.138.74   static17.byfly.gomel.by
Just discovered https://bitnodes.io/ which has accomplished much of the initial goal of my project, which was to map the Bitcoin node network and track its growth over time.
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