Yes — twc.com has IPv6.

Has both IPv4 (A) and IPv6 (AAAA) addresses.

Measured 2026-11-01 13:28 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check twc.com now

IPv6 readiness

Works over IPv6, with one gap: its mail servers lack IPv6.

Website over IPv6 twc.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2600:1408:c400:11::17cd:6b4a answers · 443✓ 2600:1408:c400:11::17cd:6b46 answers · 443	yes
www over IPv6 www.twc.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2600:1408:c400:16::17d4:f819 answers · 443✓ 2600:1408:c400:16::17d4:f816 answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. pkvw-mx.msg.pkvw.co.charter.net ✗	no
Nameservers have IPv6 6 of 11 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. dns2.rr.com ✗a1-187.akam.net ✓a7-66.akam.net ✓a18-65.akam.net ✓dns6.rr.com ✗dns3.rr.com ✗dns1.rr.com ✗dns5.rr.com ✗a2-65.akam.net ✓a12-66.akam.net ✓a11-66.akam.net ✓	yes

First measured 2026-11-01; last confirmed 2026-11-01.

HTTPS over IPv6 · not part of the grade yet
twc.com didn't complete an HTTPS request over IPv6 (timed out).

https://twc.com/ via 2600:1408:c400:11::17cd:6b4a · timed out

What's keeping twc.com from an A

Mail servers without IPv6
pkvw-mx.msg.pkvw.co.charter.net has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

twc.com Has IPv6

A (IPv4)	142.136.168.58 142.136.168.7 142.136.81.135 142.136.81.136
AAAA (IPv6)	2600:1408:c400:11::17cd:6b4a 2600:1408:c400:11::17cd:6b46

www.twc.com Has IPv6

Alias of	timewarnercable.com.edgekey.net → e29348.dsca.akamaiedge.net
A (IPv4)	23.212.251.83 23.212.251.77
AAAA (IPv6)	2600:1408:c400:16::17d4:f819 2600:1408:c400:16::17d4:f816

Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).

Copy the evidence — a citation-ready record of this measurement

IPv6 measurement: twc.com
Measured 2026-11-01 13:28:27 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    142.136.168.58, 142.136.168.7, 142.136.81.135, 142.136.81.136
AAAA (IPv6): 2600:1408:c400:11::17cd:6b4a, 2600:1408:c400:11::17cd:6b46
www AAAA:    2600:1408:c400:16::17d4:f819, 2600:1408:c400:16::17d4:f816

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: twc.com has 2 IPv6 addresses and answers on every one we tested.
    2600:1408:c400:11::17cd:6b4a: answers (TCP 443)
    2600:1408:c400:11::17cd:6b46: answers (TCP 443)
- www over IPv6: www.twc.com has 2 IPv6 addresses and answers on every one we tested.
    2600:1408:c400:16::17d4:f819: answers (TCP 443)
    2600:1408:c400:16::17d4:f816: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers has an AAAA record.
- Nameservers have IPv6: 6 of 11 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): twc.com didn't complete an HTTPS request over IPv6 (timed out).
    https://twc.com/ via 2600:1408:c400:11::17cd:6b4a, certificate: valid (timed out)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/iCnm1wdHOl

Permanent link: aaaa.bot/r/iCnm1wdHOl · How we measure

Checked 2026-11-01 13:28:27 UTC. Full DNS report: dns.pizza/domain/twc.com · JSON: /api/v1/twc.com