Autonomous system
AS3371 MCI-ASN
Unclassified ARIN
Summary
Verizon Business (MCI)
enterprise legacy
A legacy MCI autonomous system (MCI-ASN) now held by Verizon Business, and the
largest of the group by address count: it originates well over a million IPv4
addresses of Verizon's inherited space.
What it's used for
- Announcing large Verizon Business allocations, the blocks from which customer and service addressing is drawn.
Notable
- Carrier-held address space. Its size means the ranges behind it cover a broad mix of Verizon Business services rather than one organisation's network.
- Part of the
MCI-ASNfamily registered in 1994 and carried into Verizon with the 2006 MCI acquisition, alongside [AS3369](https://asn.ipinfo.app/AS3369), [AS3372](https://asn.ipinfo.app/AS3372), [AS3373](https://asn.ipinfo.app/AS3373) and [AS3374](https://asn.ipinfo.app/AS3374).
Interesting
- MCI's own network absorbed UUNET, one of the first commercial internet backbones, which is why registry records under these ASNs still show UUNET-era block names decades later.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Address space
Summary
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 136 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS3369- Registry name
- MCI-ASN
- Registrant
- Verizon Business
- Abuse contact
- abuse@verizon.com
- Registered
- 1994-01-06
- Last changed
- 2024-07-02
- Status
- active
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
No IC3 indicators Nothing from the FBI IC3 feed.
Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere