AS12110 — AS-INTER

Network type: hosting

AS12110 announces 7 IPv4 prefixes covering 2,304 addresses and 20 IPv6 prefixes.

About this network

A small US network carrying amateur radio infrastructure alongside its own address space.

What it's used for

• Announcing space on behalf of several separate organisations. 2,304 IPv4 addresses over seven prefixes with one observed BGP neighbour, plus twenty IPv6 announcements.

Notable

• Two of the blocks are registered as AMPRNET to Amateur Radio Digital Communications — part of 44.0.0.0/8, the range handed to amateur packet radio in the 1980s and still administered for amateur use today.
• Two more belong to Tampa Co-Op, under the netnames TAMPA-NET-01 and GCEH-2025.
• Reverse DNS names the projects rather than the provider: tampa.coop, pttlink.org — the PTTLink repeater linking network — and w9cr.net, an amateur radio callsign used as a domain name.
• The IPv6 announcements descend through 2602:2af:101::/48, 102::/47, 104::/46, 108::/45, 110::/44, 120::/43, 140::/42 and 180::/41, each rung twice the size of the one before.

Interesting

• That IPv6 staircase is what a single contiguous range looks like when it is written out as CIDR blocks instead of one aligned prefix. Nobody designs an address plan in that shape; it falls out of expressing "everything from here to there" in a routing table.
• 44.0.0.0/8 is one of the odder survivals in the address registry: a whole class A given to hobbyists in 1981, kept in amateur hands for four decades, with a portion sold in 2019 to fund grants for amateur radio and networking work. Space from it turning up under one small AS, next to a repeater linking network and a callsign domain, is the block being used for exactly what it was set aside for.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 23.149.104.0/24
• 44.98.244.0/23
• 44.98.254.0/24
• 192.83.199.0/24
• 198.153.212.0/24
• 199.47.172.0/24
• 199.47.174.0/23
• 2602:2af::/40
• 2602:2af:101::/48
• 2602:2af:102::/47
• 2602:2af:104::/46
• 2602:2af:108::/45
• 2602:2af:110::/44
• 2602:2af:120::/43
• 2602:2af:140::/42
• 2602:2af:180::/41
• 2602:2af:200::/39
• 2602:2af:400::/38
• 2602:2af:800::/37
• 2605:900::/36
• 2605:900:1100::/40
• 2605:900:1200::/39
• 2605:900:1400::/38
• 2605:900:1800::/37
• 2605:900:2000::/35
• 2605:900:4000::/34
• 2605:900:8000::/33

Upstream networks

• AS19151 BroadbandONE, LLC

Adjacent networks

• AS19151 BroadbandONE, LLC