freemyip.com
freemyip.com/Free dynamic subdomaindomains-dns/freemyipJSONcomparereport an errorprovider JSON
- Free allowance
- Free dynamic DNS subdomains under freemyip.com, with no login, no ads and no expiration date stated on the home page; any subdomain of the name returns the same address
- Verdict
- caveatusable, with a named limit or an unprobed read path
- Cost
- free tier
- Identity
- anonymousno card, no phone
- Binding limit
- retention-clampedthe address must be updated at least once a year, even when it has not changed, to keep the subdomain
- Evidence
- measured10 sources; a live request was made and its output kept
- Freshness
- stale on 2027-02-02checked 2026-11-03 (live); stale on 2027-02-02
| Free tier | free dynamic DNS subdomains under freemyip.com, with no login, no ads and no expiration date stated on the home page; any subdomain of the name returns the same address unit objects; metered on none |
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| Price | none stated |
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| Limits | - retention-clamped (binding) the address must be updated at least once a year, even when it has not changed, to keep the subdomain source
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| Binding | retention-clamped the yearly update is the only stated limit; the count of names is unverified; no sign-up is asked, so the token returned at creation is the only handle, and the zone is the vendor's |
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| Identity | anonymous no login is required, according to the home page; the update URL carries a token and a domain, and the creation flow itself was not run |
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| Egress | no query cap published |
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| Per-object cap | unverified: no count of subdomains per user or per address is published on the pages read |
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| Retention | the subdomain can be kept as long as wanted if the address is updated at least once a year, even with the same address; a deleted subdomain cannot be created again for 12 months (365 days) |
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| Interface | rest one HTTPS GET to /update with token and domain parameters sets the address; optional parameters set an IPv4 or IPv6 address (myip), a TXT record (txt, also applied to every subdomain of the name), a verbose reply (verbose) or a delete (delete); the reply is the text OK or ERROR with HTTP status 200 |
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| Tooling | curl, a browser, a router or any scheduler that can request a URL |
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| Composes with | a free name with a TXT parameter that the help page says also works for any subdomain of the name, so a DNS-01 challenge record can be set by inference; a CNAME or DNAME from the user's own domain can point at it; the zone is the vendor's, so it cannot be a Cloudflare zone |
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| Reliability | an update with a token that does not exist returns HTTP 200 with the body 'ERROR' and a line naming the token, so a status-only check reports success on a failed update; the suffix is on the Public Suffix List, so the TLS limit counts per name |
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| Notes | The only anonymous name in this set: no login, a token and a yearly update. The vendor's clock binds, not an owner's consent: a name lapses when the address is not updated for a year. The zone is the vendor's. The TLS limit does not bind, because the suffix is listed. |
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| Evidence note | measured the update endpoint was called with a token that does not exist and answered 200 with an ERROR body, which proves the endpoint and the failure shape; the home and help pages were read and quoted; the creation flow was not run, because it makes a name |
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| Parsed numbers | |
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Evidence 10
| date | source | what it proved |
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| 2026-11-03 | probe: https://freemyip.com/update?token=invalid&domain=invalid.freemyip.com&verbose=yes | the update endpoint answers HTTP 200 to a request with a token that does not exist |
| 2026-11-03 | probe: https://freemyip.com/update?token=invalid&domain=invalid.freemyip.com&verbose=yes | the body of that 200 is the word ERROR, followed by a line naming the missing token |
| 2026-11-03 | freemyip.com/ | free dynamic DNS with no login |
| 2026-11-03 | freemyip.com/help | a subdomain is kept by updating the address at least once a year |
| 2026-11-03 | freemyip.com/help | a deleted subdomain cannot be re-created for 12 months |
| 2026-11-03 | freemyip.com/help | part of the text of Free tier, above |
| 2026-11-03 | freemyip.com/help | a TXT record is set by a txt parameter on the update URL |
| 2026-11-03 | freemyip.com/help | the user's own domain can point at the name by CNAME |
| 2026-11-03 | publicsuffix.org/list/public_suffix_list.dat | freemyip.com is an entry of the private section of the Public Suffix List |
| 2026-11-03 | letsencrypt.org/docs/rate-limits/ | Let's Encrypt finds the registered domain with the Public Suffix List |