- Free allowance
- Free IP to ASN and IP to country database files, updated hourly: IPv4, IPv6 and combined TSV files in gzip, no account; the hosted API was phased out on December 31, 2020
- Verdict
- ★ qualifiesusable as stated; the read path was probed
- Cost
- free tier
- Identity
- anonymousno card, no phone
- Binding limit
- noneno named constraint binds
- Evidence
- measured10 sources; a live request was made and its output kept
- Freshness
- stale on 2027-01-02checked 2026-11-02 (live); stale on 2027-01-02
| Free tier | free IP to ASN and IP to country database files, updated hourly: IPv4, IPv6 and combined TSV files in gzip, no account; the hosted API was phased out on December 31, 2020 unit unlimited; metered on none; the IPv4 to ASN file ip2asn-v4.tsv.gz was 8,697,031 bytes with HTTP 200 when probed. |
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| Price | none stated |
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| Binding | none static files with no published download limit. |
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| Identity | anonymous no account; plain HTTPS downloads |
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| Egress | not applicable: static files served through Cloudflare with no published meter |
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| Per-object cap | ip2asn-v4.tsv.gz is 8,697,031 bytes (8697031 bytes) |
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| Retention | each file is the current snapshot; the page says it is updated hourly |
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| Interface | unknown plain HTTPS download of gzip-compressed TSV files from https://iptoasn.com/data/ (ip2asn-v4, ip2asn-v4-u32, ip2country-v4, ip2country-v4-u32, ip2asn-v6, ip2country-v6 and ip2asn-combined) with the columns range_start, range_end, AS_number, country_code, AS_description; the interface vocabulary has no term for a file download (https-download) |
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| Tooling | curl or wget and gunzip, any TSV reader or SQL loader; the author's iptoasn-webservice source turns the files into a lookup API, which the user installs and runs on a rented or free machine and which is the last resort after the downloads |
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| Composes with | The one free ASN and country mapping with no account and no per-request limit, usable as a local join table in a pipeline. Bulk path: the files themselves, IPv4 to ASN 8,697,031 bytes gzipped. |
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| Reliability | the hosted API was phased out on 2020-12-31 due to increasing traffic; ip2asn-v4.tsv.gz had Last-Modified Sun, 01 Nov 2026 09:38:42 GMT in an answer dated Mon, 02 Nov 2026 10:42:50 GMT, while the page says the data is updated hourly |
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| Notes | Free requests: unmetered (static files). Rate limit: none published. The data v1.0. Bulk path: the TSV files, IPv4, IPv6 and combined. Last resort: run the author's API server over the files. |
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| Evidence note | measured The IPv4 to ASN file was downloaded in full on 2026-11-02 (HTTP 200, 8,697,031 bytes) and the page was quoted; the other files were not downloaded and the hourly update claim was observed once, not tracked. |
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| Parsed numbers | |
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