AS64249 Charles River Operation

ENDOFFICE - Charles River Operation · registered in the United States

IPv4 addresses23,29651 prefixes · <0.001% of announced IPv4

Rank in United States#2,003largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#5,657of 79,396 networks with IPv4

IPv61 x /32 (69,890 x /48)5 prefixes

CountryUnited States18,679 ASNs registered there

Open AS64249 in ASN lookup Look up an IP in this network (5.182.51.1) All networks in United States

IPv4 prefixes

All 51 prefixes, in address order.

5.182.51.0/24
5.182.199.0/24
31.132.54.0/24
38.124.1.0/24
38.146.55.0/24
38.242.7.0/24
38.242.12.0/24
38.242.18.0/24
38.242.24.0/24
44.32.53.0/24
44.104.110.0/24
45.10.23.0/24
45.58.211.0/24
45.67.142.0/23
45.67.144.0/24
52.124.20.0/23
63.246.128.0/24
63.246.156.0/23
63.251.142.0/24
66.150.192.0/24
66.150.196.0/24
66.150.198.0/24
67.22.61.0/24
67.22.62.0/24
74.118.68.0/22
79.98.181.0/24
79.98.182.0/24
83.143.107.0/24
92.249.28.0/24
94.154.168.0/23
94.154.176.0/24
94.154.179.0/24
144.86.187.0/24
147.189.137.0/24
154.3.45.0/24
154.3.129.0/24
154.3.222.0/24
154.3.236.0/23
154.9.0.0/24
154.9.154.0/24
154.12.2.0/24
154.12.6.0/24
154.13.0.0/24
154.39.0.0/24
154.39.2.0/24
192.203.175.0/24
193.148.94.0/24
198.145.141.0/24
198.145.142.0/23
206.197.231.0/24
207.32.128.0/19

IPv6 prefixes

All 5 prefixes.

2001:4830:c210::/48
2001:4830:c900::/40
2602:fe6d::/36
2606:6680:13::/48
2607:5840::/32

Similar-sized networks in United States

ASNNameIPv4 addresses

AS23175#2000 POGOZONE - PogoZone23,552

AS33745#2001 ATOS-BLYTHEWOOD - Atos IT Solutions and Services Inc23,552

AS62654#2002 MENLO-SECURITY - MENLO SECURITY, INC.23,552

AS27288#2004 DPCHICO-1 - Digital Path23,296

AS1280#2005 ISC-AS-1280 - Internet Systems Consortium, Inc.23,296

AS62651#2006 NETPROTECT-DP - Strong Technology, LLC.23,296

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