Autonomous system
AS7011 FRONTIER-AND-CITIZENS
Residential ARIN
Summary
Frontier Communications
isp eyeball legacy
Autonomous System 7011 (FRONTIER-AND-CITIZENS) is one of the networks of Frontier Communications, a large US telephone and broadband carrier. The handle preserves the name of Citizens Communications, the utility company that renamed itself Frontier.
What it's used for
- Consumer and small-business fixed broadband. Reverse DNS across its prefixes is classic subscriber addressing under
frontiernet.net— names likestatic-…dsl1.chi.il.frontiernet.netand…dr01.crvl.il.frontiernet.net.
Notable
- A true eyeball network: the addresses terminate on homes and small offices, not on servers, and the reverse names encode the serving town and state.
- Frontier grew largely by acquiring landline territory from other carriers, so its address space is a patchwork of blocks inherited from predecessor telcos — which is why one company shows up under several ASNs and several rDNS suffixes.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS5650 | Frontier Communications of America, Inc. | 236 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 1.02K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS7011- Registry name
- FRONTIER-AND-CITIZENS
- Registrant
- Verizon Business
- Abuse contact
- abuse@verizon.com
- Registered
- 1996-07-25
- Last changed
- 2026-08-03
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 4 valid, 0 with no ROA
- ROAs
- 4 authorising AS7011
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 23 naming AS7011
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: 448 networks and 1,849 prefixes, as published 2026-10-29. 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