Yes — visualstudio.com has IPv6.

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

IPv6 readiness

Works over IPv6, with one gap: www doesn't fully work over IPv6.

Website over IPv6 visualstudio.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2603:1061:10:1::16 answers · 443✓ 2603:1061:10::16 answers · 443	yes
www over IPv6 www.visualstudio.com has no AAAA record.	no
Mail servers (MX) have IPv6 No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.	yes
Nameservers have IPv6 4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns1-07.azure-dns.com ✓ns2-07.azure-dns.net ✓ns3-07.azure-dns.org ✓ns4-07.azure-dns.info ✓	yes

HTTPS over IPv6 · not part of the grade yet
Redirects to www.visualstudio.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.

https://visualstudio.com/ via 2603:1061:10:1::16 → 308https://www.visualstudio.com/ · redirects to www.visualstudio.com, which has no IPv6 address

problem

What's keeping visualstudio.com from an A

www.visualstudio.com is an alias of e19210.g.akamaiedge.net, which has no IPv6
www.visualstudio.com is a CNAME, so it can't also have its own AAAA record. Ask whoever runs e19210.g.akamaiedge.net to enable IPv6 there — or replace the alias with the A and AAAA records they give you. Why some hosts don't offer IPv6
A redirect leads off IPv6
Redirects to www.visualstudio.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all. Give the redirect target IPv6 too, or redirect somewhere that has it.

Check again

visualstudio.com Has IPv6

A (IPv4)	150.171.74.16 150.171.73.16
AAAA (IPv6)	2603:1061:10:1::16 2603:1061:10::16

www.visualstudio.com IPv4 only

Alias of	wildcard.visualstudio.com.edgekey.net → e19210.g.akamaiedge.net
A (IPv4)	104.71.255.104
AAAA (IPv6)	none

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: visualstudio.com
Measured 2026-10-31 13:40:02 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    150.171.74.16, 150.171.73.16
AAAA (IPv6): 2603:1061:10:1::16, 2603:1061:10::16
www AAAA:    none

Readiness grade B: Works over IPv6, with one gap: www doesn't fully work over IPv6.
- Website over IPv6: visualstudio.com has 2 IPv6 addresses and answers on every one we tested.
    2603:1061:10:1::16: answers (TCP 443)
    2603:1061:10::16: answers (TCP 443)
- www over IPv6: www.visualstudio.com has no AAAA record.
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.
- Nameservers have IPv6: 4 of 4 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): Redirects to www.visualstudio.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.
    https://visualstudio.com/ via 2603:1061:10:1::16 -> HTTP 308, certificate: valid
    https://www.visualstudio.com/ (redirects to www.visualstudio.com, which has no IPv6 address)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/U_npskRuAI

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

Checked 2026-10-31 13:40:02 UTC. Full DNS report: dns.pizza/domain/visualstudio.com · JSON: /api/v1/visualstudio.com