Autonomous system profile

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

AS27311

Announcement observedARIN

AS27311 - Biogen MA Inc · AS27311

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

Last active10/1/2026, 22:58:01Snapshot expired

View network topology RDAP registration

ASN: AS27311
Registration country: United States
Name: AS27311 - Biogen MA Inc
Abbreviation: AS27311
Registration date: 11/5/2015, 17:54:06
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
161.199.168.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 16:00:00	10/13/2026, 00:00:00	✓	×	Currently valid
161.199.170.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 16:00:00	10/13/2026, 00:00:00	✓	×	Currently valid
161.199.171.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 16:00:00	10/13/2026, 00:00:00	✓	×	Currently valid
198.180.131.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 16:00:00	10/13/2026, 00:00:00	✓	×	Currently valid

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

Registration and sources

Organization: AS27311 - Biogen MA Inc
RIR: ARIN
Registration country: United States
Registration date: 11/5/2015, 17:54:06
Abuse contact: mohanraj.babu@biogen.com

Snapshot trend

10/1/2026, 22:58:014 v40 v63 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 · rir-rdap-asn · iana-rdap-asn-bootstrap