AS22843 Proofpoint, Inc.

PROOFPOINT-ASN-US-EAST - Proofpoint, Inc. · registered in the United States

IPv4 addresses12,80017 prefixes · <0.001% of announced IPv4

Rank in United States#2,623largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#7,963of 79,396 networks with IPv4

IPv64 x /483 prefixes

CountryUnited States18,679 ASNs registered there

Open AS22843 in ASN lookup Look up an IP in this network (66.159.228.1) All networks in United States

IPv4 prefixes

All 17 prefixes, in address order.

66.159.228.0/24
66.159.238.0/23
66.159.250.0/23
67.231.152.0/22
67.231.156.0/23
148.163.136.0/21
148.163.152.0/22
148.163.158.0/23
205.220.172.0/22
205.220.176.0/21
205.220.187.0/24
208.56.12.0/22
208.56.60.0/22
208.83.137.0/24
208.83.139.0/24
208.84.67.0/24
208.86.201.0/24

IPv6 prefixes

All 3 prefixes.

2620:0:2900::/48
2620:0:2902::/48
2620:100:9004::/47

Other ASNs named Proofpoint, Inc.

2 other networks use the same organisation name; together with AS22843 they announce 28,672 IPv4 addresses.

ASNNameIPv4 addresses

AS26211PROOFPOINT-ASN-US-WEST - Proofpoint, Inc. US14,592

AS13916PROOFPOINT-UT7 - Proofpoint, Inc. US1,280

Similar-sized networks in United States

ASNNameIPv4 addresses

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AS16578#2622 DATANOC - Lanset America Corporation12,800

AS5662#2624 WBD-AS5662 - Turner Broadcasting System, Inc.12,800

AS636#2625 DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD)12,800

AS1294#2626 NTTDATA-SERVICES-AS1 - NTT DATA Services Holdings Corporation12,800

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