AS22121 Topsham Communications LLC

TOPSHAM-COMMUNICATIONS - Topsham Communications LLC · registered in the United States

IPv4 addresses3,3283 prefixes · <0.001% of announced IPv4

Rank in United States#5,118largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#17,424of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS22121 in ASN lookup Look up an IP in this network (38.56.71.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

38.56.71.0/24
172.99.224.0/22
199.21.136.0/21

IPv6 prefixes

All 1 prefix.

2604:14c0::/32

Similar-sized networks in United States

ASNNameIPv4 addresses

AS3423#5115 ATTIS-ASN3423 - AT&T Enterprises, LLC3,328

AS16409#5116 PBW-COMMUNICATIONS - PBW Communications, LLC3,328

AS16715#5117 ARISTOTLE-ASN - Aristotle Internet Access3,328

AS27298#5119 REACH4 - REACH4 Communications3,328

AS27602#5120 PATHFINDER-ASN - Pathfinder Broadband3,328

AS46572#5121 COWBOY-HOSTING - Cowboy Hosting LLC3,328

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources