PeerGlass

Fetch the complete registration history for an IP prefix or ASN.

Returns a chronological timeline of every change ever recorded:

• Initial registration (who, when, under which RIR)

• Org / maintainer changes (potential ownership transfers)

• Status changes (allocated → assigned → available)

• Last-changed updates

Uses RIPE Stat's historical-whois and allocation-history APIs. Coverage is best for RIPE NCC resources; partial for other RIRs.

Use cases:

• "Has this IP block ever changed hands?"

• "When was this ASN first registered?"

• "What organization historically owned this prefix?"

• Due diligence, incident response, fraud investigation

Results are cached for 12 hours (historical records are stable).

Args: params (PrefixHistoryInput): - resource (str): IP prefix (e.g. '8.8.8.0/24') or ASN (e.g. 'AS15169') - response_format (str): 'markdown' (default) or 'json'

Returns: str: Chronological event timeline with dates, event types, and attribute changes. JSON schema: { "resource": str, "resource_type": str, "current_holder": str, "current_rir": str, "registration_date": str, "total_events": int, "events": [{"event_date": str, "event_type": str, "attribute": str, "old_value": str, "new_value": str}], "sources": [str], "errors": [str] }