AS3376 — MCI-ASN

AS3376 announces 4 IPv4 prefixes covering 21,504 addresses and 0 IPv6 prefixes.

About this network

One of the legacy MCI autonomous systems (MCI-ASN), inherited by Verizon Business when Verizon acquired MCI. It sits in a block of consecutive MCI ASNs that still ride alongside the main Verizon backbone, AS701.

What it's used for

• Announcing a small set of MCI-era prefixes on behalf of Verizon Business and its customers.
• Not a general-purpose transit ASN in its own right — the heavy lifting is done by AS701.

Notable

• Registered to Verizon Business in Ashburn, Virginia; the ARIN record traces back to the mid-1990s, when MCI ran one of the earliest commercial internet backbones.
• Address space announced here is carrier-assigned, so it typically maps to business customers rather than to Verizon itself.

Interesting

• The neighbouring numbers AS3375, AS3377 and AS3378 carry the identical MCI-ASN handle — a fossil of how MCI reserved a run of ASNs at once.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 146.1.160.0/19
• 146.1.232.0/22
• 165.122.64.0/19
• 165.122.96.0/20

Upstream networks

• AS3371 Verizon Business

Adjacent networks

• AS3371 Verizon Business