AS11776 — ATLANTICBB-JOHNSTOWN

Network type: residential

AS11776 announces 227 IPv4 prefixes covering 1,053,184 addresses and 12 IPv6 prefixes.

About this network

ATLANTICBB-JOHNSTOWN is Breezeline, the cable broadband operator formerly known as Atlantic Broadband. The handle still names Johnstown, Pennsylvania, but the network this AS carries reaches well beyond it. This is a consumer eyeball network — the largest in this AS range by a wide margin.

What it's used for

Residential and small-business broadband access. RIS sees 1,901 IPv4 prefixes carrying just over 1,050,000 addresses, 19 IPv6 prefixes, and 32 observed BGP neighbours. That ratio is the definitive eyeball signature: a million addresses behind only a few dozen peers means the space terminates at customers, not at other networks. A carrier of the same address size would peer with hundreds. The reverse DNS removes any doubt — sampled hosts answer as d-75-118-0-5.oh.cpe.breezeline.net and static-23-244-0-5.oh.cpe.breezeline.net. cpe is customer-premises equipment: cable modems in homes.

Notable

The rDNS doubles as a service map. State codes are embedded in the names — oh for Ohio, nh for New Hampshire, sc for South Carolina, fl for Florida — across three surviving domains: breezeline.net, atlanticbb.net and metrocast.net. The prefix registrants match: blocks register variously to Breezeline, Atlantic Broadband and Metrocast Cablevision. Those are not unrelated third parties but the same company under successive names, Metrocast having been absorbed into Atlantic Broadband before the Breezeline rebrand.

Interesting

Nearly 1,900 prefixes for one million addresses works out to an average block smaller than a /22. Cable operators accumulate address space in small fragments, market by market, and rarely get to aggregate it afterwards.

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

Announced prefixes

• 23.244.0.0/16
• 23.245.0.0/17
• 23.245.128.0/19
• 23.245.168.0/21
• 23.245.176.0/20
• 23.245.192.0/18
• 24.35.31.0/24
• 24.145.0.0/18
• 24.145.64.0/19
• 24.145.112.0/20
• 24.153.32.0/19
• 24.214.150.0/23
• 24.214.152.0/21
• 24.214.160.0/20
• 24.214.176.0/22
• 24.214.180.0/23
• 24.214.192.0/22
• 24.214.196.0/23
• 24.214.198.0/24
• 24.214.230.0/23
• 24.214.232.0/21
• 24.233.96.0/20
• 24.233.112.0/23
• 24.233.114.0/24
• 24.233.116.0/22
• 24.233.120.0/21
• 24.233.200.0/21
• 24.233.208.0/20
• 24.245.96.0/20
• 24.245.116.0/22
• 24.245.120.0/21
• 64.186.80.0/20
• 65.60.128.0/17
• 65.99.96.0/19
• 65.175.128.0/17
• 66.29.192.0/19
• 66.85.4.0/23
• 66.212.192.0/19
• 66.232.248.0/23
• 67.231.64.0/20
• 68.234.32.0/24
• 69.84.96.0/19
• 69.161.64.0/19
• 69.161.96.0/20
• 69.161.112.0/21
• 69.161.120.0/23
• 69.161.122.0/24
• 69.161.124.0/22
• 69.171.192.0/21
• 69.171.200.0/22
• 69.171.204.0/23
• 69.171.207.0/24
• 72.9.0.0/19
• 72.28.128.0/17
• 72.45.0.0/18
• 74.81.192.0/19
• 74.214.32.0/19
• 75.76.40.0/22
• 75.76.44.0/23
• 75.76.46.0/24
• 75.76.48.0/20
• 75.76.64.0/22
• 75.76.68.0/24
• 75.76.70.0/23
• 75.76.72.0/21
• 75.76.80.0/22
• 75.76.85.0/24
• 75.76.86.0/23
• 75.76.88.0/21
• 75.76.96.0/21
• 75.76.104.0/23
• 75.76.106.0/24
• 75.76.108.0/22
• 75.76.112.0/21
• 75.76.120.0/22
• 75.76.124.0/23
• 75.76.127.0/24
• 75.76.128.0/23
• 75.76.172.0/24
• 75.76.174.0/24
• 75.76.176.0/24
• 75.76.178.0/23
• 75.76.180.0/22
• 75.76.184.0/21
• 75.76.192.0/18
• 75.118.0.0/16
• 76.73.195.0/24
• 76.73.196.0/22
• 76.73.200.0/24
• 76.73.204.0/22
• 76.73.208.0/22
• 76.73.212.0/23
• 76.73.215.0/24
• 76.73.216.0/21
• 76.73.224.0/21
• 76.73.232.0/22
• 76.73.236.0/23
• 76.73.238.0/24
• 76.73.240.0/20
• 104.153.40.0/22

and 139 more.

Upstream networks

• AS1299 Arelion Sweden AB
• AS174 Cogent Communications, LLC
• AS2914 NTT America, Inc.
• AS6939 Hurricane Electric LLC

Downstream networks

• AS21767 Washington College
• AS394109 CFH CABLE INC
• AS36240 Communications Unlimited Inc.
• AS62514 Venus Telephone Corporation
• AS36857 Freudenberg-NOK General Parternership
• AS397606 Crowsnest Broadband
• AS40593 Cloud Compliance Solutions
• AS397038 Broward College
• AS401023 Kwikbit Internet, Inc.
• AS19357 New Enterprise Stone & Lime Company
• AS398427 Markley Network Services, LLC
• AS397488 New Albany-Plain Local School District
• AS16993 Cumberland Farms, Inc.
• AS18751 Basketball Properties Ltd
• AS11370 UltraWISP, LLC
• AS399295 Somerset Trust Company
• AS395790 SOUTHERN MARYLAND ELECTRIC COOPERATIVE INC
• AS55118 Value Drug Company Inc.
• AS40742 UPMC
• AS398312 Grandview Heights Schools
• AS19917 Mohegan Sun
• AS53796 Miami Children's Hospital
• AS35978 GPB Communications Inc
• AS30012 Universal Music Group, INC.
• AS398320 Talbot County Department of Emergency Services

Adjacent networks

• AS1299 Arelion Sweden AB
• AS174 Cogent Communications, LLC
• AS2914 NTT America, Inc.
• AS6939 Hurricane Electric LLC
• AS21767 Washington College
• AS398427 Markley Network Services, LLC
• AS394109 CFH CABLE INC
• AS36240 Communications Unlimited Inc.
• AS62514 Venus Telephone Corporation
• AS36857 Freudenberg-NOK General Parternership
• AS397606 Crowsnest Broadband
• AS40593 Cloud Compliance Solutions
• AS397038 Broward College
• AS401023 Kwikbit Internet, Inc.
• AS19357 New Enterprise Stone & Lime Company
• AS397488 New Albany-Plain Local School District
• AS16993 Cumberland Farms, Inc.
• AS18751 Basketball Properties Ltd
• AS11370 UltraWISP, LLC
• AS399295 Somerset Trust Company
• AS395790 SOUTHERN MARYLAND ELECTRIC COOPERATIVE INC
• AS55118 Value Drug Company Inc.
• AS40742 UPMC
• AS398312 Grandview Heights Schools
• AS19917 Mohegan Sun

Internet exchanges

• Pittsburgh Internet Exchange — Pittsburgh, United States