asn.dev

Autonomous system

AS19721 MHN

Unclassified ARIN

IPv4 addresses 8.19K 8 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Magellan Health

United States of America · AI-generated

healthcare business corporate

The AS handle MHN is held by Magellan Health.

What it's used for

  • The address space carries internal corporate infrastructure for a behavioral health provider, evidenced by the consistent netname MAGEL and registrant MagellanBehavioralHealth across all prefixes.
  • The AS announces 8192 IPv4 addresses across 8 prefixes with only 2 observed neighbours, indicating a small, self-contained internal network rather than a transit or access provider.

Notable

  • All registrants align with the announcer, consistently identified as MagellanBehavioralHealth with the netname MAGEL.
  • Magellan Health is a major US behavioral health provider; the AS number reflects its corporate identity in the routing table.
  • The inventory consists of a single contiguous block (204.193.64.0/20) subdivided into smaller prefixes, typical of internal site segmentation.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS49915Megaport (UK) Limited649
AS3356Level 3 Parent, LLC176

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 8 prefixes · 8.19K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America8

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS19721
Registry name
MHN
Registrant
Magellan Health Services
Abuse contact
webba3@magellanhealth.com
Registered
2001-02-07
Last changed
2012-03-20
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 14 with no ROA
ROAs
0 authorising AS19721
ASPA
no ASPA record
IRR
100% registered · 14 of 14 announcements
Route objects
18 naming AS19721

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 447 networks and 1,845 prefixes, as published 2026-10-31. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check