Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS53266

Announcement observedARIN

DFN Systems · DFNSYSRSWL

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/4/2026, 22:57:45Snapshot expired

View network topology RDAP registration

ASN: AS53266
Registration country: United States
Name: DFN Systems
Abbreviation: DFNSYSRSWL
Registration date: 7/16/2009, 19:17:20
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
199.83.116.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 16:00:00	10/4/2026, 16:00:00	✓	×	Historical record
74.116.128.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 16:00:00	10/4/2026, 16:00:00	✓	×	Historical record

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: DFN Systems
RIR: ARIN
Registration country: United States
Registration date: 7/16/2009, 19:17:20
Abuse contact: cjgreen@dfn.com

Snapshot trend

10/4/2026, 22:57:452 v40 v62 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn