Autonomous system
AS11426 TWC-11426-CAROLINAS
Residential ARIN
Summary
Charter Communications (Time Warner Cable Carolinas)
isp legacy
TWC-11426-CAROLINAS is one of the regional cable-broadband ASes Charter Communications inherited from Time Warner Cable. It carries residential Spectrum subscribers, principally in the Carolinas, and it is one of the larger eyeball networks in this AS range.
What it's used for
RIS shows 210 announced IPv4 prefixes covering roughly 4.7 million addresses, plus 9 IPv6 prefixes. The IPv4 inventory is built from big aggregates — several /14s and /15s, such as 172.72.0.0/14, 71.68.0.0/14 and 174.108.0.0/14 — which is the signature of a mass-market access network handing out address pools to subscriber CPE, not of a hosting estate carving out per-customer /24s.
Reverse DNS settles it. Sampled addresses across those aggregates resolve to syn-172-072-000-005.res.spectrum.com and siblings: the res. label is Spectrum's residential-subscriber zone, and the pattern repeats consistently across unrelated blocks. The prefix registrants agree, with the large blocks registered directly to Charter Communications Inc under the RRMA handle. Only 81 observed neighbours against nearly five million addresses is exactly the ratio expected of an eyeball network: it buys upstream and peers, but it is not selling transit at scale.
Notable
The consistent .res.spectrum.com naming makes this a high-confidence residential classification. It is the access network itself, so geolocation within the Carolinas footprint is meaningful at the block level rather than for the AS as a whole.
Interesting
Two stray /24s seen in the RIS window, 37.153.154.0/24 (RIPE) and 181.214.13.0/24 (LACNIC), are registered not to Charter but to an IP-leasing marketplace maintainer. Against 200-plus self-registered Charter aggregates they are a footnote, not a pattern, and they do not change what this AS is.
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, 78 downstream and 92 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS7843 | Charter Communications Inc | 13,005 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 281 prefixes · 4.39M addresses IPv6 11 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 292 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11426- Registry name
- TWC-11426-CAROLINAS
- Registrant
- Charter Communications Inc
- Abuse contact
- abuse@charter.net
- Registered
- 2000-06-09
- Last changed
- 2018-11-27
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 87% valid · 187 valid, 27 with no ROA 1 RPKI-invalid
- ROAs
- 238 authorising AS11426
- ASPA
- no ASPA record
- IRR
- 96% registered · 206 of 215 announcements 1 other origin
- Route objects
- 364 naming AS11426
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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