Autonomous system
AS3377 MCI-ASN
Unclassified ARIN
Summary
Verizon Business (MCI)
transit isp legacy
A legacy MCI autonomous system (MCI-ASN) now operated by Verizon Business. It is one of several adjacent MCI ASNs that survived the MCI → MCI WorldCom → Verizon Business chain of acquisitions.
What it's used for
- Announcing MCI-era address space for Verizon Business, mostly customer and managed-service networks.
- It complements, rather than replaces, Verizon's main backbone ASN AS701.
Notable
- The ARIN registration dates to 1994 — a genuine early-internet allocation from MCI's backbone build-out, not a modern reissue.
- Carrier-assigned addressing: IPs here normally sit inside customer organizations that buy connectivity from Verizon Business.
Interesting
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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 78.34K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
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
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 18 with no ROA
- ROAs
- 0 authorising AS3377
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 18 announcements
- Route objects
- 0 naming AS3377
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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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