AS3372 — MCI-ASN
AS3372 announces 70 IPv4 prefixes covering 424,704 addresses and 1 IPv6 prefixes.
About this network
A legacy MCI autonomous system (MCI-ASN) held by Verizon Business, and the most fragmented of the group: it originates over a hundred separate prefixes of Verizon's inherited address space.
What it's used for
- Announcing many small Verizon Business allocations, largely carved out of the older MCI network blocks.
Notable
- Carrier address space, split into a large number of individual announcements rather than a few big aggregates, which is typical of long-lived enterprise and customer assignments accumulated over decades.
- One of the MCI-ASN numbers registered in 1994 and inherited by Verizon in 2006; its siblings are AS3369, AS3371, AS3373 and AS3374.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 63.39.160.0/19
- 63.39.192.0/20
- 63.39.240.0/20
- 69.96.16.0/20
- 69.96.32.0/19
- 108.11.64.0/18
- 151.205.32.0/19
- 165.122.0.0/19
- 165.122.112.0/20
- 165.122.144.0/20
- 165.122.160.0/19
- 166.32.0.0/19
- 166.32.48.0/20
- 166.32.128.0/19
- 166.32.160.0/20
- 166.32.240.0/20
- 166.33.0.0/17
- 166.33.160.0/19
- 166.33.192.0/20
- 166.34.128.0/17
- 166.35.128.0/17
- 166.36.0.0/19
- 166.36.80.0/20
- 166.37.0.0/18
- 166.37.96.0/19
- 166.38.34.0/24
- 166.38.38.0/24
- 166.38.52.0/23
- 166.38.76.0/22
- 166.38.160.0/20
- 166.38.176.0/24
- 166.38.178.0/23
- 166.38.180.0/22
- 166.38.188.0/22
- 166.38.192.0/19
- 166.38.224.0/20
- 166.39.0.0/20
- 166.39.64.0/19
- 166.39.116.0/22
- 166.39.120.0/21
- 166.39.128.0/19
- 166.39.208.0/20
- 166.40.112.0/20
- 166.40.161.0/24
- 166.40.162.0/23
- 166.40.164.0/22
- 166.40.169.0/24
- 166.40.172.0/23
- 166.40.216.0/21
- 166.41.16.0/20
- 166.41.32.0/19
- 166.41.144.0/20
- 166.41.160.0/19
- 166.41.192.0/20
- 166.43.144.0/20
- 166.43.160.0/19
- 166.46.112.0/20
- 166.46.160.0/19
- 166.46.192.0/20
- 166.46.224.0/20
- 166.47.144.0/20
- 166.47.160.0/20
- 166.47.240.0/20
- 166.50.80.0/20
- 166.56.32.0/19
- 166.56.64.0/18
- 166.56.248.0/23
- 166.58.128.0/20
- 166.58.224.0/20
- 166.58.248.0/21
- 2600:40f3::/32
Upstream networks
- AS3378 Verizon Business
Downstream networks
Adjacent networks
BGP / ASN / CIDR
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IPv4
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IPv6
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Search Results
IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED