https://www.bgp4.net/doku.php?id=tools:ipv4_looking_glasses

http://routeserver.org

https://www.dan.me.uk/bgplookup

http://lg.iranet.ir

IPv4

12.0.1.28

:
12.123.21.243  Atlanta   12.123.133.124 Austin    12.123.41.250  Cambridge
12.123.5.240   Chicago   12.123.17.244  Dallas    12.123.139.124 Detroit
12.122.83.238  Denver    12.123.134.124 Houston   12.123.29.249  LA
12.123.1.236   New York  12.123.33.249  Orlando   12.123.137.124 Philly
12.123.142.124 Phoenix   12.123.145.124 SanDiego  12.123.13.241  SanFran
12.123.25.245  St.Louis  12.122.125.224 Seattle   12.123.9.241   WashDC