Autonomous system
AS7843 TWC-7843-BB
Residential ARIN Cable/DSL/ISP
Summary
Charter Communications (legacy Time Warner Cable)
isp legacy
TWC-7843-BB is one of the Time Warner Cable autonomous systems inherited by Charter Communications after the 2016 merger. It is operated today as part of Charter's Spectrum network.
What it's used for
- Cable broadband service to homes. Despite the
BB(backbone) suffix in the handle, the announced space is overwhelmingly subscriber addressing. - Reverse DNS is the standard Charter residential template: addresses in
66.61.0.0/16,69.134.0.0/17,24.30.192.0/19,65.28.192.0/19and76.85.224.0/19resolve assyn-066-061-000-001.res.spectrum.comand similar. Thereslabel is Charter's residential zone. - Older Road Runner infrastructure names survive alongside it on the routers, in the form
ae5-3201.irtnoh-mx41.natcky.rr.com.
Notable
- The handle is a kind trap. A network named
-BBinvites being filed as backbone or transit; the rDNS says otherwise. Roughly 300,000 addresses ofres.spectrum.comsubscriber space is an eyeball network, and traffic from it is home users. - Charter runs many legacy Time Warner Cable and Bright House ASNs alongside its own. Address space is regional here (holdovers from Time Warner's franchise footprint), so a single geolocation for the whole AS is a poor fit.
Interesting
- The
rr.comdomain in the router names is Road Runner, the Time Warner Cable consumer broadband brand retired in favour of Spectrum. The reverse-DNS zones outlived the brand by a decade, which is why one AS answers to three company names at once.
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 15 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.238.34 |
| DE-CIX New York | New York, United States | 206.82.104.48 |
| Equinix Internet Exchange Chicago | Chicago, United States | 208.115.136.70 |
| Equinix Internet Exchange Dallas | Dallas, United States | 206.223.118.189 |
| Equinix Internet Exchange San Jose (Bay Area) | San Jose, United States | 206.223.117.90 |
| Equinix Internet Exchange Miami | Miami, United States | 198.32.242.203 |
| DE-CIX Dallas | Dallas, United States | 206.53.202.145 |
| Equinix Internet Exchange New York | New York, United States | 198.32.118.83 |
Transit providers
14 upstream, 30 downstream and 83 adjacent networks observed; most-used upstreams first.
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 173 prefixes · 437K addresses IPv6 38 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 211 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS7843- Registry name
- TWC-7843-BB
- Registrant
- Charter Communications Inc
- Abuse contact
- abuse@charter.net
- Registered
- 1997-01-23
- Last changed
- 2018-11-27
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Charter Communications (7843)
- Also known as
- Formerly TWC, Spectrum
- Network type
- Cable/DSL/ISP
- Scope
- North America
- Traffic ratio
- Heavy Inbound
- Peering policy
- Selective
- IRR as-set
RADB::AS-ROADRUNNER- Present at
- 12 exchanges
- Facilities
- 14 facilities
- Website
- https://www.spectrum.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
- 98% valid · 162 valid, 0 with no ROA 4 RPKI-invalid
- ROAs
- 456 authorising AS7843
- ASPA
- no ASPA record
- IRR
- 92% registered · 153 of 166 announcements
- Route objects
- 630 naming AS7843
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