Does costco.com support IPv6?
FailChecked · Online stores
No. On November 6, 2026, www.costco.com published no AAAA record, so its home page cannot be opened over an IPv6-only connection at all.
3hosts loaded
0over IPv6
3IPv4 only
0%coverage
Hosts that block an IPv6-only load
These hosts publish an IPv4 address but no AAAA record. Over an IPv6-only connection the browser cannot fetch anything they serve.
- www.costco.com — the page itself, link rel=stylesheet, link rel=preload, <script src>
- gdx-assets.costco.com — link rel=preload, <img src>, <img srcset>
- mobilecontent.costco.com — link rel=preload
Every host the costco.com home page loads from
| Host | Protocol | AAAA record |
|---|---|---|
| www.costco.comThe page itself | IPv4 only | — |
| gdx-assets.costco.com | IPv4 only | — |
| mobilecontent.costco.com | IPv4 only | — |
Can I reach costco.com through an IPv6 proxy?
An IPv6-only route cannot reach this site. Use residential IPv4.
How this was measured
The IPv6 test loaded https://www.costco.com/ once on November 6, 2026, read every host the returned HTML asks a browser to fetch, and looked up AAAA and A records for each. Hosts added later by JavaScript are not counted, and other pages on the site can depend on different hosts. Results change as sites move providers.