Autonomous system
AS3375 MCI-ASN
Unclassified ARIN
Summary
Verizon Business (MCI)
transit isp legacy
A legacy MCI autonomous system (MCI-ASN), now held by Verizon Business after Verizon's acquisition of MCI. It is one of a run of adjacent MCI ASNs that Verizon still announces alongside its main backbone, AS701.
What it's used for
- Announcing Verizon Business / MCI-era address space, largely customer and managed-service networks rather than backbone transit itself.
- Registered under Verizon Business's Ashburn, Virginia address, the same registrant as the rest of the Verizon Business ASN family.
Notable
- The ARIN record dates to 1994, so this is a genuine early allocation from the era when MCI was building out one of the internet's first commercial backbones.
- Carrier-assigned space: addresses here generally belong to organizations buying connectivity from Verizon, not to Verizon's own offices.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS3372 | Verizon Business | 480 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 9 prefixes · 33.28K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 9 |
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, 8 with no ROA
- ROAs
- 0 authorising AS3375
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 8 announcements
- Route objects
- 0 naming AS3375
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: 448 networks and 1,851 prefixes, as published 2026-10-29. 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