3372 MCI-ASN, US
Adjacency: 4 Upstream: 1 Downstream: 3
Upstream Adjacent AS list
AS3378 MCI-ASN, US
Downstream Adjacent AS list
AS3375 MCI-ASN, US
AS3371 MCI-ASN, US
AS3377 MCI-ASN, US
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 704 AS3372 ORG+TRN Originate: 493056 /13.09 Transit: 69632 /15.91 MCI-ASN, US
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 1714 AS3372 MCI-ASN, US 107 52 18 73 34 31.78% Prefix AS Path Aggregation Suggestion 63.39.160.0/20 2914 701 3378 3372 63.39.176.0/20 3257 701 3378 3372 63.39.192.0/20 3257 701 3378 3372 63.39.240.0/20 3257 701 3378 3372 69.96.16.0/20 3257 701 3378 3372 69.96.32.0/19 3257 701 3378 3372 + Announce - aggregate of 69.96.32.0/20 (3257 701 3378 3372) and 69.96.48.0/20 (3257 701 3378 3372) 69.96.32.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 69.96.48.0/20 (3257 701 3378 3372) 69.96.48.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 69.96.32.0/20 (3257 701 3378 3372) 108.11.64.0/18 2914 701 3378 3372 151.205.32.0/19 2914 701 3378 3372 165.122.0.0/16 6939 701 3378 3372 165.122.0.0/19 2914 701 3378 3372 165.122.160.0/19 2914 701 3378 3372 166.32.0.0/19 3257 701 3378 3372 + Announce - aggregate of 166.32.0.0/20 (3257 701 3378 3372) and 166.32.16.0/20 (3257 701 3378 3372) 166.32.0.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.32.16.0/20 (3257 701 3378 3372) 166.32.16.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.32.0.0/20 (3257 701 3378 3372) 166.32.48.0/20 3257 701 3378 3372 166.32.56.0/24 3257 701 3378 3372 - Withdrawn - matching aggregate 166.32.48.0/20 3257 701 3378 3372 166.32.128.0/19 3257 701 3378 3372 166.32.160.0/20 3257 701 3378 3372 166.32.240.0/20 3257 701 3378 3372 166.33.0.0/17 3257 701 3378 3372 + Announce - aggregate of 166.33.0.0/18 (3257 701 3378 3372) and 166.33.64.0/18 (3257 701 3378 3372) 166.33.0.0/19 3257 701 3378 3372 - Withdrawn - aggregated with 166.33.32.0/19 (3257 701 3378 3372) 166.33.11.0/24 3257 701 3378 3372 - Withdrawn - matching aggregate 166.33.0.0/19 3257 701 3378 3372 166.33.32.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.33.48.0/20 (3257 701 3378 3372) 166.33.48.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.33.56.0/21 (3257 701 3378 3372) 166.33.52.0/22 2914 701 3378 3372 166.33.56.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.33.48.0/21 (3257 701 3378 3372) 166.33.64.0/19 3257 701 3378 3372 - Withdrawn - aggregated with 166.33.96.0/19 (3257 701 3378 3372) 166.33.96.0/19 3257 701 3378 3372 - Withdrawn - aggregated with 166.33.64.0/19 (3257 701 3378 3372) 166.33.160.0/19 3257 701 3378 3372 + Announce - aggregate of 166.33.160.0/20 (3257 701 3378 3372) and 166.33.176.0/20 (3257 701 3378 3372) 166.33.160.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.33.176.0/20 (3257 701 3378 3372) 166.33.176.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.33.160.0/20 (3257 701 3378 3372) 166.33.192.0/20 3257 701 3378 3372 166.34.128.0/17 3257 701 3378 3372 166.35.128.0/17 3257 701 3378 3372 166.36.0.0/19 3257 701 3378 3372 + Announce - aggregate of 166.36.0.0/20 (3257 701 3378 3372) and 166.36.16.0/20 (3257 701 3378 3372) 166.36.0.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.36.16.0/20 (3257 701 3378 3372) 166.36.16.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.36.24.0/21 (3257 701 3378 3372) 166.36.24.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.36.16.0/21 (3257 701 3378 3372) 166.36.80.0/20 3257 701 3378 3372 + Announce - aggregate of 166.36.80.0/21 (3257 701 3378 3372) and 166.36.88.0/21 (3257 701 3378 3372) 166.36.80.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.36.88.0/21 (3257 701 3378 3372) 166.36.88.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.36.80.0/21 (3257 701 3378 3372) 166.37.0.0/18 3257 701 3378 3372 166.37.96.0/19 3257 701 3378 3372 166.38.34.0/24 3257 701 3378 3372 166.38.38.0/24 6939 701 3378 3372 166.38.52.0/23 3257 701 3378 3372 + Announce - aggregate of 166.38.52.0/24 (3257 701 3378 3372) and 166.38.53.0/24 (3257 701 3378 3372) 166.38.52.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.53.0/24 (3257 701 3378 3372) 166.38.53.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.52.0/24 (3257 701 3378 3372) 166.38.76.0/22 3257 701 3378 3372 166.38.160.0/20 3257 701 3378 3372 + Announce - aggregate of 166.38.160.0/21 (3257 701 3378 3372) and 166.38.168.0/21 (3257 701 3378 3372) 166.38.160.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.168.0/21 (3257 701 3378 3372) 166.38.163.0/24 3257 701 3378 3372 - Withdrawn - matching aggregate 166.38.160.0/21 3257 701 3378 3372 166.38.168.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.160.0/21 (3257 701 3378 3372) 166.38.176.0/24 3257 701 3378 3372 166.38.178.0/24 2914 701 3378 3372 166.38.179.0/24 3257 701 3378 3372 166.38.180.0/22 3257 701 3378 3372 + Announce - aggregate of 166.38.180.0/23 (3257 701 3378 3372) and 166.38.182.0/23 (3257 701 3378 3372) 166.38.180.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.181.0/24 (3257 701 3378 3372) 166.38.181.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.180.0/24 (3257 701 3378 3372) 166.38.182.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.183.0/24 (3257 701 3378 3372) 166.38.183.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.182.0/24 (3257 701 3378 3372) 166.38.188.0/22 3257 701 3378 3372 + Announce - aggregate of 166.38.188.0/23 (3257 701 3378 3372) and 166.38.190.0/23 (3257 701 3378 3372) 166.38.188.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.189.0/24 (3257 701 3378 3372) 166.38.189.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.188.0/24 (3257 701 3378 3372) 166.38.190.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.191.0/24 (3257 701 3378 3372) 166.38.191.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.38.190.0/24 (3257 701 3378 3372) 166.38.192.0/19 2914 701 3378 3372 166.38.192.0/20 2914 701 3378 3372 - Withdrawn - matching aggregate 166.38.192.0/19 2914 701 3378 3372 166.38.208.0/20 2914 701 3378 3372 - Withdrawn - matching aggregate 166.38.192.0/19 2914 701 3378 3372 166.38.224.0/20 3257 701 3378 3372 166.39.0.0/20 3257 701 3378 3372 166.39.64.0/19 3257 701 3378 3372 + Announce - aggregate of 166.39.64.0/20 (3257 701 3378 3372) and 166.39.80.0/20 (3257 701 3378 3372) 166.39.64.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.39.80.0/20 (3257 701 3378 3372) 166.39.80.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.39.64.0/20 (3257 701 3378 3372) 166.39.116.0/22 3257 701 3378 3372 166.39.120.0/21 3257 701 3378 3372 166.39.128.0/19 3257 701 3378 3372 + Announce - aggregate of 166.39.128.0/20 (3257 701 3378 3372) and 166.39.144.0/20 (3257 701 3378 3372) 166.39.128.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.39.144.0/20 (3257 701 3378 3372) 166.39.144.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.39.152.0/21 (3257 701 3378 3372) 166.39.152.0/21 3257 701 3378 3372 - Withdrawn - aggregated with 166.39.144.0/21 (3257 701 3378 3372) 166.39.208.0/20 3257 701 3378 3372 166.40.112.0/20 3257 701 3378 3372 166.40.161.0/24 3257 701 3378 3372 166.40.162.0/23 3257 701 3378 3372 + Announce - aggregate of 166.40.162.0/24 (3257 701 3378 3372) and 166.40.163.0/24 (3257 701 3378 3372) 166.40.162.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.40.163.0/24 (3257 701 3378 3372) 166.40.163.0/24 3257 701 3378 3372 - Withdrawn - aggregated with 166.40.162.0/24 (3257 701 3378 3372) 166.40.164.0/22 3257 701 3378 3372 + Announce - aggregate of 166.40.164.0/23 (3257 701 3378 3372) and 166.40.166.0/23 (3257 701 3378 3372) 166.40.164.0/23 3257 701 3378 3372 - Withdrawn - aggregated with 166.40.166.0/23 (3257 701 3378 3372) 166.40.166.0/23 3257 701 3378 3372 - Withdrawn - aggregated with 166.40.164.0/23 (3257 701 3378 3372) 166.40.169.0/24 3257 701 3378 3372 166.40.172.0/23 3257 701 3378 3372 166.40.216.0/21 3257 701 3378 3372 166.41.16.0/20 3257 701 3378 3372 166.41.32.0/19 3257 701 3378 3372 166.41.144.0/20 3257 701 3378 3372 166.41.160.0/19 3257 701 3378 3372 + Announce - aggregate of 166.41.160.0/20 (3257 701 3378 3372) and 166.41.176.0/20 (3257 701 3378 3372) 166.41.160.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.41.176.0/20 (3257 701 3378 3372) 166.41.168.0/22 3257 701 3378 3372 - Withdrawn - matching aggregate 166.41.160.0/20 3257 701 3378 3372 166.41.176.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.41.160.0/20 (3257 701 3378 3372) 166.41.192.0/20 3257 701 3378 3372 166.43.144.0/20 3257 701 3378 3372 166.43.160.0/20 2914 701 3378 3372 166.43.176.0/20 3257 701 3378 3372 166.46.112.0/20 3257 701 3378 3372 166.46.160.0/19 3257 701 3378 3372 + Announce - aggregate of 166.46.160.0/20 (3257 701 3378 3372) and 166.46.176.0/20 (3257 701 3378 3372) 166.46.160.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.46.176.0/20 (3257 701 3378 3372) 166.46.176.0/20 3257 701 3378 3372 - Withdrawn - aggregated with 166.46.160.0/20 (3257 701 3378 3372) 166.46.192.0/20 3257 701 3378 3372 166.46.224.0/20 2914 701 3378 3372 166.47.144.0/20 3257 701 3378 3372 166.47.160.0/20 3257 701 3378 3372 166.47.240.0/20 3257 701 3378 3372 166.50.80.0/20 3257 701 3378 3372 166.56.32.0/19 3257 701 3378 3372 166.56.64.0/18 3257 701 3378 3372 + Announce - aggregate of 166.56.64.0/19 (3257 701 3378 3372) and 166.56.96.0/19 (3257 701 3378 3372) 166.56.64.0/19 3257 701 3378 3372 - Withdrawn - aggregated with 166.56.96.0/19 (3257 701 3378 3372) 166.56.96.0/19 3257 701 3378 3372 - Withdrawn - aggregated with 166.56.64.0/19 (3257 701 3378 3372) 166.56.248.0/23 6939 701 3378 3372 166.58.128.0/20 3257 701 3378 3372 166.58.224.0/20 3257 701 3378 3372 166.58.248.0/21 3257 701 3378 3372 + Announce - aggregate of 166.58.248.0/22 (3257 701 3378 3372) and 166.58.252.0/22 (3257 701 3378 3372) 166.58.248.0/22 3257 701 3378 3372 - Withdrawn - aggregated with 166.58.252.0/22 (3257 701 3378 3372) 166.58.252.0/22 3257 701 3378 3372 - Withdrawn - aggregated with 166.58.248.0/22 (3257 701 3378 3372)
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS3372 104 More Specifics 105 Total Advertisements MCI-ASN, US
63.39.160.0/20 63.36.0.0/14
63.39.176.0/20 63.36.0.0/14
63.39.192.0/20 63.36.0.0/14
63.39.240.0/20 63.36.0.0/14
151.205.32.0/19 151.204.0.0/15
165.122.0.0/19 165.122.0.0/16
165.122.152.0/21 165.122.0.0/16
165.122.160.0/19 165.122.0.0/16
165.122.223.0/24 165.122.0.0/16
166.32.0.0/20 166.32.0.0/13
166.32.16.0/20 166.32.0.0/13
166.32.48.0/20 166.32.0.0/13
166.32.56.0/24 166.32.0.0/13
166.32.128.0/19 166.32.0.0/13
166.32.160.0/20 166.32.0.0/13
166.32.240.0/20 166.32.0.0/13
166.33.0.0/19 166.32.0.0/13
166.33.11.0/24 166.32.0.0/13
166.33.32.0/20 166.32.0.0/13
166.33.48.0/21 166.32.0.0/13
166.33.52.0/22 166.32.0.0/13
166.33.56.0/21 166.32.0.0/13
166.33.64.0/19 166.32.0.0/13
166.33.96.0/19 166.32.0.0/13
166.33.160.0/20 166.32.0.0/13
166.33.176.0/20 166.32.0.0/13
166.33.192.0/20 166.32.0.0/13
166.34.128.0/17 166.32.0.0/13
166.35.128.0/17 166.32.0.0/13
166.36.0.0/20 166.32.0.0/13
166.36.16.0/21 166.32.0.0/13
166.36.24.0/21 166.32.0.0/13
166.36.80.0/21 166.32.0.0/13
166.36.88.0/21 166.32.0.0/13
166.37.0.0/18 166.32.0.0/13
166.37.96.0/19 166.32.0.0/13
166.38.34.0/24 166.32.0.0/13
166.38.38.0/24 166.32.0.0/13
166.38.52.0/24 166.32.0.0/13
166.38.53.0/24 166.32.0.0/13
166.38.76.0/22 166.32.0.0/13
166.38.160.0/21 166.32.0.0/13
166.38.163.0/24 166.32.0.0/13
166.38.168.0/21 166.32.0.0/13
166.38.176.0/24 166.32.0.0/13
166.38.178.0/24 166.32.0.0/13
166.38.179.0/24 166.32.0.0/13
166.38.180.0/24 166.32.0.0/13
166.38.181.0/24 166.32.0.0/13
166.38.182.0/24 166.32.0.0/13
166.38.183.0/24 166.32.0.0/13
166.38.188.0/24 166.32.0.0/13
166.38.189.0/24 166.32.0.0/13
166.38.190.0/24 166.32.0.0/13
166.38.191.0/24 166.32.0.0/13
166.38.192.0/19 166.32.0.0/13
166.38.192.0/20 166.32.0.0/13
166.38.208.0/20 166.32.0.0/13
166.38.224.0/20 166.32.0.0/13
166.39.0.0/20 166.32.0.0/13
166.39.64.0/20 166.32.0.0/13
166.39.80.0/20 166.32.0.0/13
166.39.116.0/22 166.32.0.0/13
166.39.120.0/21 166.32.0.0/13
166.39.128.0/20 166.32.0.0/13
166.39.144.0/21 166.32.0.0/13
166.39.152.0/21 166.32.0.0/13
166.39.208.0/20 166.32.0.0/13
166.40.112.0/20 166.40.0.0/16
166.40.161.0/24 166.40.0.0/16
166.40.162.0/24 166.40.0.0/16
166.40.163.0/24 166.40.0.0/16
166.40.164.0/23 166.40.0.0/16
166.40.166.0/23 166.40.0.0/16
166.40.169.0/24 166.40.0.0/16
166.40.172.0/23 166.40.0.0/16
166.40.216.0/21 166.40.0.0/16
166.41.16.0/20 166.41.0.0/16
166.41.32.0/19 166.41.0.0/16
166.41.144.0/20 166.41.0.0/16
166.41.160.0/20 166.41.0.0/16
166.41.168.0/22 166.41.0.0/16
166.41.176.0/20 166.41.0.0/16
166.41.192.0/20 166.41.0.0/16
166.43.144.0/20 166.42.0.0/15
166.43.160.0/20 166.42.0.0/15
166.43.176.0/20 166.42.0.0/15
166.46.112.0/20 166.46.0.0/15
166.46.160.0/20 166.46.0.0/15
166.46.176.0/20 166.46.0.0/15
166.46.192.0/20 166.46.0.0/15
166.46.224.0/20 166.46.0.0/15
166.47.144.0/20 166.46.0.0/15
166.47.160.0/20 166.46.0.0/15
166.47.240.0/20 166.46.0.0/15
166.50.80.0/20 166.50.0.0/15
166.56.32.0/19 166.56.0.0/16
166.56.64.0/19 166.56.0.0/16
166.56.96.0/19 166.56.0.0/16
166.56.248.0/23 166.56.0.0/16
166.58.128.0/20 166.58.0.0/16
166.58.224.0/20 166.58.0.0/16
166.58.248.0/22 166.58.0.0/16
166.58.252.0/22 166.58.0.0/16
whois: 402603
IANA has recorded AS3372 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS3372\n
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
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# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
ASNumber: 3369 - 3378
ASName: MCI-ASN
ASHandle: AS3369
RegDate: 1994-01-06
Updated: 2024-07-02
Ref: https://rdap.arin.net/registry/autnum/3369
OrgName: Verizon Business
OrgId: MCICS
Address: 22001 Loudoun County Pkwy
City: Ashburn
StateProv: VA
PostalCode: 20147
Country: US
RegDate: 2006-05-30
Updated: 2025-10-28
Ref: https://rdap.arin.net/registry/entity/MCICS
OrgTechHandle: VIS1-ARIN
OrgTechName: Verizon Internet Services
OrgTechPhone: +1-800-243-6994
OrgTechEmail: IPMGMT@verizon.com
OrgTechRef: https://rdap.arin.net/registry/entity/VIS1-ARIN
OrgDNSHandle: VZDNS1-ARIN
OrgDNSName: VZ-DNSADMIN
OrgDNSPhone: +1-800-900-0241
OrgDNSEmail: dnsadmin@verizon.com
OrgDNSRef: https://rdap.arin.net/registry/entity/VZDNS1-ARIN
OrgTechHandle: SWIPP9-ARIN
OrgTechName: SWIPPER
OrgTechPhone: +1-800-900-0241
OrgTechEmail: swipper@verizon.com
OrgTechRef: https://rdap.arin.net/registry/entity/SWIPP9-ARIN
OrgAbuseHandle: ABUSE5603-ARIN
OrgAbuseName: Abuse
OrgAbusePhone: +1-800-900-0241
OrgAbuseEmail: abuse@verizon.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE5603-ARIN
OrgAbuseHandle: ABUSE3-ARIN
OrgAbuseName: abuse
OrgAbusePhone: +1-800-900-0241
OrgAbuseEmail: abuse-mail@verizonbusiness.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE3-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#