AS19855 Masergy Communications, Inc.

MASERGY - Masergy Communications, Inc. · registered in the United States

IPv4 addresses157,440117 prefixes · 0.005% of announced IPv4

Rank in United States#391largest network in US by IPv4 space, of 18,338 · 0.01% of US

Rank worldwide#1,276of 79,396 networks with IPv4

IPv63 x /32 (196,640 x /48)5 prefixes

CountryUnited States18,679 ASNs registered there

Open AS19855 in ASN lookup Look up an IP in this network (45.45.151.1) All networks in United States

IPv4 prefixes

All 117 prefixes, in address order.

45.45.151.0/24
64.47.0.0/22
64.47.4.0/23
64.47.6.0/23
64.47.8.0/22
64.47.12.0/23
64.47.14.0/24
64.47.16.0/23
64.47.18.0/24
64.47.19.0/24
64.47.20.0/23
64.47.22.0/23
64.47.24.0/24
64.47.26.0/23
64.47.28.0/22
64.47.32.0/24
64.47.34.0/23
64.47.36.0/23
64.47.38.0/23
64.47.40.0/23
64.47.42.0/23
64.47.44.0/23
64.47.46.0/24
64.47.47.0/24
64.47.48.0/22
64.47.52.0/22
64.47.56.0/23
64.47.58.0/23
64.47.60.0/22
64.47.64.0/19
64.47.96.0/21
64.47.104.0/23
64.47.106.0/23
64.47.108.0/22
64.47.112.0/22
64.47.116.0/22
64.47.120.0/22
64.47.124.0/22
64.47.128.0/24
64.47.129.0/24
64.47.130.0/23
64.47.132.0/22
64.47.136.0/21
64.47.144.0/20
64.47.160.0/22
64.47.164.0/24
64.47.165.0/24
64.47.166.0/23
64.47.169.0/24
64.47.170.0/23
64.47.173.0/24
64.47.174.0/23
64.47.176.0/22
64.47.180.0/24
64.47.181.0/24
64.47.182.0/23
64.47.184.0/24
64.47.185.0/24
64.47.186.0/23
64.47.188.0/22
64.47.192.0/22
64.47.196.0/23
64.47.199.0/24
64.47.200.0/21
64.47.208.0/22
64.47.212.0/23
64.47.214.0/24
64.47.215.0/24
64.47.216.0/23
64.47.218.0/24
64.47.219.0/24
64.47.220.0/23
64.47.222.0/24
64.47.224.0/21
64.47.232.0/23
64.47.234.0/23
64.47.236.0/23
64.47.238.0/24
64.47.239.0/24
64.47.240.0/21
64.47.248.0/21
64.138.0.0/21
64.138.8.0/22
64.138.12.0/22
64.138.16.0/21
64.138.24.0/23
64.138.26.0/24
64.138.27.0/24
64.138.28.0/22
64.138.32.0/19
64.138.64.0/18
64.138.128.0/22
64.138.132.0/22
64.138.136.0/23
64.138.138.0/23
64.138.140.0/23
64.138.142.0/24
64.138.144.0/21
64.138.152.0/23
64.138.154.0/23
64.138.156.0/22
64.138.160.0/19
65.96.0.0/18
65.96.128.0/18
74.116.49.0/24
80.241.64.0/20
93.187.16.0/21
94.199.128.0/21
140.242.146.0/23
169.143.243.0/24
185.60.28.0/22
192.131.149.0/24
192.197.247.0/24
198.73.224.0/24
204.139.40.0/24
204.139.45.0/24
204.139.49.0/24

IPv6 prefixes

All 5 prefixes.

2400:7160:2000::/44
2400:7160:2020::/44
2402:2100::/32
2607:fa70::/32
2a03:6580::/32

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AS1968#394 UMASSNET-AS1968 - UMASSNET155,904

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources