AS22843 — PROOFPOINT-ASN-US-EAST

AS22843 announces 17 IPv4 prefixes covering 12,800 addresses and 3 IPv6 prefixes.

About this network

PROOFPOINT-ASN-US-EAST is operated by Proofpoint, Inc.

What it's used for

• The address space carries enterprise cybersecurity infrastructure, evidenced by reverse DNS entries such as mx0b-0033e401.pphosted.com and 67-231-154-254.proofpoint.com, indicating mail exchange and hosted services.
• With 12,800 IPv4 addresses announced across 17 prefixes and only 3 observed neighbours, the ratio suggests an internal corporate estate rather than a transit or access network.

Notable

• Registrants are predominantly Proofpoint, Inc., with netnames like PROOFPOINT-NET-NORTH-AMERICA and PROOF; two prefixes (208.56.12.0/22 and 208.56.60.0/22) list Meta Networks Inc as registrant, likely reflecting historical allocation or lease.
• The inventory is finely subdivided into /21, /22, /23, and /24 blocks, consistent with site-by-site segmentation for a large enterprise.
• Proofpoint is an American enterprise cybersecurity company based in Sunnyvale, California, providing SaaS solutions for email security and compliance.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

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

Upstream networks

• AS1299 Arelion Sweden AB
• AS174 Cogent Communications, LLC
• AS3356 Level 3 Parent, LLC

Adjacent networks

• AS1299 Arelion Sweden AB
• AS174 Cogent Communications, LLC
• AS3356 Level 3 Parent, LLC

Routing security

• RPKI: 45 valid, 0 invalid and 4 not-found announcements; 15 ROAs.
• ASPA: none published.
• IRR: 94% of announcements registered; 54 route objects.
• Listed in as-sets: AS-INCAPSULA, AS-INCAPSULA, AS-PROOFPOINT, AS1299:AS-TWELVE99-NA-V4, AS1299:AS-TWELVE99-NA-V6, AS19551:AS-IMPERVA.