AS15129 — GENESEO-IL - Geneseo Telephone Company

AS15129 announces 12 IPv4 prefixes covering 20,736 addresses and 1 IPv6 prefixes.

About this network

Six netname conventions, three reverse-DNS schemes, and a college's block in the middle.

What it's used for

• A rural telephone company's network. Twelve IPv4 prefixes and one IPv6 /32 announced from the United States, with eight observed BGP neighbours.

Notable

• The netnames run GNEO, GTC-NETWORK-1, 111-GNEO-10, 111S-GNEO-4 and 111-GNEO-12: the same four-letter code wrapped in three different numbering schemes, one of which adds a letter to its leading number.
• Three announced blocks are registered to other organisations, including a college and an information services company, under netnames of their own.
• Five of eighteen sampled addresses answered, in three unrelated forms: the last two octets with a service marker, the full address with a different marker, and a short device code with no address in it at all.
• All three forms sit under the same domain, so one zone carries three conventions.

Interesting

• The leading 111 on three netnames is the kind of number that means something inside one office and nothing anywhere else. Adding a letter to it on one block makes a fourth variant of an identifier that already had three.
• Carrying a college's addresses is how small telephone companies fund a network. The institution keeps its own registration, the carrier announces the route, and the registry alone would tell you they are unrelated.
• Three reverse-name schemes in one zone means anything parsing them needs three rules, and the one with no address in it cannot be checked against the address it answers for.

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

Announced prefixes

• 164.152.208.0/21
• 205.142.76.0/22
• 205.201.56.0/24
• 206.125.128.0/20
• 208.52.132.0/22
• 208.123.224.0/19
• 216.175.16.0/21
• 216.175.24.0/24
• 216.175.26.0/23
• 216.175.28.0/23
• 216.175.30.0/24
• 216.175.34.0/23
• 2606:8b80::/32

Upstream networks

• AS6939 Hurricane Electric LLC
• AS174 Cogent Communications, LLC

Downstream networks

• AS394348 American Rental Association
• AS394658 Sedona Technologies
• AS30200 DerbyTech Computer Works
• AS22534 CS Technologies
• AS26213 Dealer Marketing Services

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS174 Cogent Communications, LLC
• AS394348 American Rental Association
• AS394658 Sedona Technologies
• AS11796 Airstream Communications, LLC
• AS30200 DerbyTech Computer Works
• AS22534 CS Technologies
• AS26213 Dealer Marketing Services

Routing security

• RPKI: 0 valid, 0 invalid and 15 not-found announcements; 1 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 35 route objects.
• Listed in as-sets: AS-AUREON, AS-AUREON-TRANSIT, AS-GNEO-IL, AS-GPC-TRANSIT, AS-HURRICANE, AS-HURRICANEV6, AS-TRANSROUTE-SPEC, AS-XO, AS-XO-B, AS11796:AS-CUSTOMERS, AS11796:AS-CUSTOMERS-ARIN, AS13807:AS-CUSTOMERS, AS30200:AS-PEERS.