AS36105 — BBT-ISP

AS36105 announces 11 IPv4 prefixes covering 25,600 addresses and 0 IPv6 prefixes.

About this network

The AS handle BBT-ISP is operated by Big Bend Telephone Company, Inc.

What it's used for

• The address space carries residential and business access traffic, evidenced by reverse DNS entries such as 65-65-132-0.dsl.bigbend.net and 209-65-146-0.dsl.bigbend.net.
• The network announces 25,600 IPv4 addresses across 14 prefixes while maintaining only 4 observed neighbours, a ratio that indicates an access or eyeball network rather than a transit provider.

Notable

• Registrants largely align with the announcer, including "Big Bend Telephone Company, Inc." and "BIG BEND," though some prefixes like 65.65.128.0/20 list "AT&T Enterprises, LLC" and others use "SBCIS" netnames, reflecting historical acquisitions.
• Big Bend Telephone Company was founded in 1960 and serves as a rural telecommunications provider in West Texas.
• The inventory consists of 14 IPv4 prefixes with no IPv6 announcements, including blocks inherited from SBC and AT&T.

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

Announced prefixes

• 12.183.158.0/23
• 12.227.48.0/23
• 38.224.0.0/21
• 38.224.8.0/22
• 65.65.128.0/20
• 65.65.152.0/21
• 75.41.144.0/22
• 159.117.48.0/20
• 204.80.112.0/20
• 209.65.144.0/21
• 216.243.240.0/20

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS13876 FiberLight, LLC
• AS7018 AT&T Enterprises, LLC
• AS46455 WWLTH, Inc

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS13876 FiberLight, LLC
• AS7018 AT&T Enterprises, LLC
• AS46455 WWLTH, Inc

Routing security

• RPKI: 34 valid, 0 invalid and 0 not-found announcements; 10 ROAs.
• ASPA: none published.
• IRR: 68% of announcements registered; 100 route objects.
• Listed in as-sets: AS-NLI, AS13876:AS-CUSTOMERS.