AS6389 — BELLSOUTH-NET-BLK

Network type: residential

AS6389 announces 581 IPv4 prefixes covering 4,427,264 addresses and 0 IPv6 prefixes.

About this network

BELLSOUTH-NET-BLK is one of the largest consumer eyeball networks in the United States. Registered to AT&T Enterprises, LLC, it is the former BellSouth.net network — the internet arm of the BellSouth regional Bell operating company, absorbed by AT&T in 2006 and now the AT&T Southeast broadband footprint.

What it's used for

• Residential broadband across the old BellSouth nine-state territory in the US Southeast: DSL, U-verse and fibre subscribers.
• Small-business access riding the same access network.
• Announces on the order of four million IPv4 addresses — mostly full /16s such as 65.14.0.0/16, 74.228.0.0/16 and 74.238.0.0/16, aggregated into a few dozen large prefixes.

Notable

This is eyeball address space at national scale. A very large IPv4 count carried in a handful of big, contiguous blocks is the signature of a consumer access network: addresses are handed to household CPE from regional pools, so geolocation resolves to metro areas across the Southeast rather than to a single site. Traffic is evening-peaked and download-heavy.

Note carefully which AT&T entity this is: AT&T runs many autonomous systems, and AS6389 is specifically the BellSouth-inherited consumer network, not AT&T's global backbone or its mobility network.

Interesting

The AS number was registered in 1996, when BellSouth.net was standing up dial-up service — one of the RBOCs racing to sell internet access to their own telephone customers. The corporate name on the record has changed twice since; the routing has been continuous.

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

Announced prefixes

• 12.130.209.0/24
• 65.5.0.0/23
• 65.5.4.0/24
• 65.5.10.0/24
• 65.5.12.0/22
• 65.5.16.0/20
• 65.5.32.0/19
• 65.5.64.0/18
• 65.5.128.0/22
• 65.5.132.0/24
• 65.5.136.0/21
• 65.5.144.0/20
• 65.5.160.0/19
• 65.5.192.0/18
• 65.13.0.0/16
• 65.14.0.0/17
• 65.14.128.0/18
• 65.14.192.0/19
• 65.14.224.0/21
• 65.14.233.0/24
• 65.14.234.0/23
• 65.14.236.0/22
• 65.14.240.0/20
• 65.15.0.0/16
• 65.81.0.0/16
• 65.82.0.0/20
• 65.82.16.0/22
• 65.82.20.0/23
• 65.82.22.0/24
• 65.82.24.0/21
• 65.82.32.0/19
• 65.82.64.0/19
• 65.82.96.0/23
• 65.82.98.0/24
• 65.82.100.0/22
• 65.82.104.0/21
• 65.82.112.0/20
• 65.82.128.0/23
• 65.82.134.0/23
• 65.82.138.0/23
• 65.82.141.0/24
• 65.82.142.0/23
• 65.82.144.0/20
• 65.82.160.0/19
• 65.82.192.0/18
• 65.83.0.0/16
• 66.20.0.0/19
• 66.20.32.0/21
• 66.20.40.0/22
• 66.20.44.0/24
• 66.20.46.0/23
• 66.20.48.0/20
• 66.20.64.0/18
• 66.20.128.0/18
• 66.20.192.0/20
• 66.20.208.0/22
• 66.20.214.0/23
• 66.20.216.0/21
• 66.20.224.0/20
• 66.20.240.0/22
• 66.20.245.0/24
• 66.20.246.0/23
• 66.20.249.0/24
• 66.20.250.0/23
• 66.20.252.0/22
• 66.21.0.0/19
• 66.21.32.0/21
• 66.21.40.0/23
• 66.21.43.0/24
• 66.21.44.0/22
• 66.21.48.0/20
• 66.21.64.0/18
• 66.21.128.0/17
• 67.32.0.0/15
• 68.16.0.0/21
• 68.16.16.0/23
• 68.16.19.0/24
• 68.16.20.0/22
• 68.16.24.0/23
• 68.16.27.0/24
• 68.16.28.0/22
• 68.16.32.0/19
• 68.16.64.0/20
• 68.16.80.0/24
• 68.16.82.0/23
• 68.16.84.0/22
• 68.16.88.0/21
• 68.16.96.0/19
• 68.16.128.0/17
• 68.17.0.0/16
• 68.152.0.0/21
• 68.152.8.0/24
• 68.152.10.0/23
• 68.152.12.0/22
• 68.152.16.0/20
• 68.152.32.0/19
• 68.152.64.0/18
• 68.152.128.0/17
• 68.153.0.0/20
• 68.153.17.0/24

and 481 more.

Upstream networks

• AS7018 AT&T Enterprises, LLC

Downstream networks

• AS11712 AT&T Services, Inc.

Adjacent networks

• AS7018 AT&T Enterprises, LLC
• AS11712 AT&T Services, Inc.