Autonomous system
AS11776 ATLANTICBB-JOHNSTOWN
Residential ARIN Cable/DSL/ISP
Summary
Breezeline
isp legacy
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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Pittsburgh Internet Exchange | Pittsburgh, United States | 206.71.141.16 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 507 prefixes · 1.05M addresses IPv6 19 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 526 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11776- Registry name
- ATLANTICBB-JOHNSTOWN
- Registrant
- Breezeline
- Abuse contact
- abuse@breezeline.com
- Registered
- 2005-03-14
- Last changed
- 2012-03-02
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Breezeline
- Also known as
- Atlantic Broadband
- Network type
- Cable/DSL/ISP
- Scope
- North America
- Traffic ratio
- Heavy Inbound
- Peering policy
- Open
- IRR as-set
AS-ATLANTICBB- Present at
- 3 exchanges
- Facilities
- 15 facilities
- Website
- http://www.breezeline.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 99.1% valid · 1,921 valid, 17 with no ROA
- ROAs
- 1,925 authorising AS11776
- ASPA
- no ASPA record
- IRR
- 99.3% registered · 1,924 of 1,938 announcements
- Route objects
- 2,054 naming AS11776
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere