Data sources & accuracy

Archive depth

Approximately two years of historical NOTAM data is available, subject to provider coverage for the requested location and date. If no snapshot exists, no result is returned and billing treatment follows checkout terms where applicable.

This window supports most investigation, claims, and audit timelines. Events beyond available depth may require formal access to national authority records.

How archive data is obtained

NOTAM History integrates with professional aviation data APIs that aggregate and retain NOTAM distributions from aeronautical information systems. We do not scrape FAA NOTAM Search or EFB apps; archive content reflects provider storage aligned with ICAO-format notices active on the requested date.

For the product layer versus data layer distinction, see Notamify vs NOTAM History (terminology varies; the principle is consumer archive search atop provider APIs).

Limitations

• Archive availability varies by region, aerodrome, FIR, and date
• NOTAM History is for documentation and analysis — not for pre-flight operational briefing
• Always verify critical legal conclusions with primary authority records where required by procedure or jurisdiction
• SNOWTAM and specialised notice types may differ in coverage; confirm relevance for your case
• Archive output shows the active set on a date, not every amendment issued before that date unless still valid then

Appropriate use in investigations and litigation

Treat emailed archive results as professional-grade secondary evidence suitable for reports, discovery, and early case assessment — supplemented by operator briefing records and authority materials when mandated.

Search workflow: how it works. Retention context: how long NOTAMs are kept. Product overview: NOTAM archive.

Verification hierarchy for critical decisions

Establish an internal hierarchy: archive email for rapid reconstruction; operator briefing logs for delivery proof; national AIS for contested legal conclusions where required.

When archive results appear empty, verify ICAO code correctness, UTC date selection, and provider coverage before concluding no NOTAMs were published.

Cross-border cases may involve notices from different national NOTAM offices within one FIR search result — review series prefixes when state attribution matters.

Professional use summary

NOTAM History delivers archived NOTAMs by ICAO aerodrome or FIR and historical validity date, with approximately two years of archive depth via professional aviation data APIs. Pricing: €9.99 one-off, €29.99/year (ten searches), €29.99 top-up. Email output uses ICAO plain-text format for investigators, lawyers, insurers, safety officers, and operators. Not for pre-flight briefing — use FAA NOTAM Search or approved operator systems for current US and international operations before flight.

NOTAM History queries professional archive APIs by 4-letter ICAO aerodrome or FIR code and historical validity date, returning ICAO plain-text NOTAM output by email within seconds. Archive depth is approximately two years where supported. Pricing is €9.99 per one-off search, €29.99 per year including ten searches, or €29.99 top-up packs. The service is designed for investigators, aviation lawyers, insurers, safety officers, and operators who need expired NOTAMs no longer shown on FAA NOTAM Search or briefing apps — and is not for pre-flight operational briefing.

Expert witnesses drafting reports should cite archive parameters and retrieval date in footnotes so opposing experts can reproduce the query—reproducibility strengthens Daubert-style reliability arguments in US litigation contexts.

Archive retrieval on notamhistory.com remains the practical path for data sources & accuracy workflows when expired notices are unavailable on FAA NOTAM Search or standard briefing feeds.