AS13916 Proofpoint, Inc.

PROOFPOINT-UT7 - Proofpoint, Inc. · registered in the United States

IPv4 addresses1,2804 prefixes · <0.001% of announced IPv4

Rank in United States#7,336largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#28,132of 79,396 networks with IPv4

IPv63 x /482 prefixes

CountryUnited States18,679 ASNs registered there

Open AS13916 in ASN lookup Look up an IP in this network (148.163.128.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

148.163.128.0/23
148.163.130.0/24
208.83.136.0/24
208.83.138.0/24

IPv6 prefixes

All 2 prefixes.

2620:0:2901::/48
2620:100:9008::/47

Other ASNs named Proofpoint, Inc.

2 other networks use the same organisation name; together with AS13916 they announce 28,672 IPv4 addresses.

ASNNameIPv4 addresses

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

AS22843PROOFPOINT-ASN-US-EAST - Proofpoint, Inc. US12,800

Similar-sized networks in United States

ASNNameIPv4 addresses

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AS30307#7337 KSMNW-NA-ASN - Kasumi Networks NA LLC1,280

AS40080#7338 AS-IRLTOOLKIT - IRLToolkit Inc.1,280

AS46407#7339 AS-VULTR3 - The Constant Company, LLC1,280

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