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WorldIP.io
Autonomous System

AS26211

Proofpoint, Inc.

Announced IPs
14,592
CIDR prefixes
18
ASN
AS26211

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

65/100
Moderate
How this score is built

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
67.231.144.0/21 2.0K
93.8%
Proofpoint, Inc. US — —
148.163.144.0/21 2.0K
98.1%
Proofpoint, Inc. US — —
205.220.160.0/21 2.0K
98.2%
Proofpoint, Inc. US — —
148.163.132.0/22 1.0K
97.4%
Proofpoint, Inc. US — —
205.220.168.0/22 1.0K
98.3%
Proofpoint, Inc. US — —
208.56.8.0/22 1.0K
98.4%
Proofpoint, Inc. US — —
208.56.56.0/22 1.0K
0.5%
Proofpoint, Inc. US — —
66.159.240.0/23 512
99.4%
Proofpoint, Inc. US — —
66.159.248.0/23 512
99.0%
Proofpoint, Inc. US — —
67.231.158.0/23 512
98.2%
Proofpoint, Inc. US California Sunnyvale
148.163.156.0/23 512
98.6%
Proofpoint, Inc. US — —
205.220.190.0/23 512
23.4%
Proofpoint, Inc. US — —
208.86.202.0/23 512
59.2%
Proofpoint, Inc. US California San Jose
66.159.227.0/24 256
69.9%
Proofpoint, Inc. US — —
67.231.159.0/24 256
99.6%
Proofpoint, Inc. US California Sunnyvale
205.220.186.0/24 256
69.9%
Proofpoint, Inc. US — —
208.56.16.0/24 256
9.4%
Proofpoint, Inc. US — —
208.84.65.0/24 256
97.7%
Proofpoint, Inc. US California Sunnyvale
208.84.66.0/24 256
70.3%
Proofpoint, Inc. US Utah Saratoga Springs
67.231.158.128/25 128
96.9%
Proofpoint, Inc. US — —
67.231.158.64/26 64
96.9%
Proofpoint, Inc. US — —
67.231.158.32/27 32
96.9%
Proofpoint, Inc. US — —
67.231.158.16/28 16
100.0%
Proofpoint, Inc. US — —
67.231.158.0/29 8
100.0%
Proofpoint, Inc. US — —
67.231.158.12/30 4
100.0%
Proofpoint, Inc. US — —
67.231.158.8/31 2
100.0%
Proofpoint, Inc. US — —
67.231.158.10/32 1
100.0%
Proofpoint, Inc. CA — —
67.231.158.11/32 1
100.0%
Proofpoint, Inc. US — —

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS26211 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
67.231.158.0/24 41,929 2026-11-09 08:02:10
67.231.159.0/24 41,900 2026-11-09 08:02:10
205.220.190.0/24 37,469 2026-11-09 08:05:23
208.84.65.0/24 30,763 2026-11-09 08:05:25
148.163.135.0/24 30,450 2026-11-09 08:03:48
208.56.16.0/24 27,668 2026-11-09 08:05:25
67.231.150.0/24 21,137 2026-11-09 08:02:10
67.231.151.0/24 21,119 2026-11-09 08:02:10
205.220.191.0/24 20,878 2026-11-09 08:05:23
208.84.66.0/24 20,751 2026-11-09 08:05:25
208.86.202.0/24 16,343 2026-11-09 08:05:25
148.163.156.0/23 15,443 2026-11-09 08:03:48
148.163.145.0/24 15,286 2026-11-09 08:03:48
66.159.248.0/23 15,070 2026-11-09 08:02:03
148.163.147.0/24 15,069 2026-11-09 08:03:48
67.231.148.0/24 15,061 2026-11-09 08:02:10
67.231.146.0/24 15,050 2026-11-09 08:02:10
66.159.241.0/24 15,044 2026-11-09 08:02:03
67.231.144.0/24 15,039 2026-11-09 08:02:10
148.163.148.0/22 15,030 2026-11-09 08:03:48
67.231.149.0/24 15,021 2026-11-09 08:02:10
67.231.145.0/24 15,008 2026-11-09 08:02:10
148.163.133.0/24 15,005 2026-11-09 08:03:48
66.159.227.0/24 14,999 2026-11-09 08:02:03
148.163.144.0/24 14,987 2026-11-09 08:03:48
148.163.146.0/24 14,986 2026-11-09 08:03:48
67.231.147.0/24 14,982 2026-11-09 08:02:10
66.159.240.0/24 14,965 2026-11-09 08:02:03
148.163.132.0/24 14,965 2026-11-09 08:03:48
148.163.134.0/24 14,935 2026-11-09 08:03:48
205.220.160.0/24 14,824 2026-11-09 08:05:23
205.220.161.0/24 14,808 2026-11-09 08:05:23
208.56.8.0/24 14,806 2026-11-09 08:05:25
208.56.9.0/24 14,761 2026-11-09 08:05:25
208.56.10.0/24 14,747 2026-11-09 08:05:25
208.56.11.0/24 14,741 2026-11-09 08:05:25
205.220.186.0/24 14,721 2026-11-09 08:05:23
205.220.171.0/24 14,713 2026-11-09 08:05:23
205.220.165.0/24 14,700 2026-11-09 08:05:23
208.86.203.0/24 14,700 2026-11-09 08:05:25
205.220.169.0/24 14,689 2026-11-09 08:05:23
205.220.163.0/24 14,686 2026-11-09 08:05:23
205.220.167.0/24 14,670 2026-11-09 08:05:23
205.220.166.0/24 14,667 2026-11-09 08:05:23
205.220.168.0/24 14,664 2026-11-09 08:05:23
205.220.170.0/24 14,662 2026-11-09 08:05:23
205.220.164.0/24 14,658 2026-11-09 08:05:23
205.220.162.0/24 14,607 2026-11-09 08:05:23
208.56.57.0/24 10,314 2026-11-09 08:05:25
208.56.58.0/24 10,275 2026-11-09 08:05:25

Showing top 50 of 52 announced prefixes by sample volume.

Frequently Asked Questions

What is AS26211?

AS26211 is an Autonomous System Number assigned to Proofpoint, Inc.. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS26211 announce?

AS26211 announces 14.6K IPv4 addresses distributed across 18 routed CIDR prefixes. The network is registered in United States.

Who operates AS26211?

AS26211 is operated by Proofpoint, Inc.. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.

What country is AS26211 registered in?

AS26211 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-11-09 08:24:06 UTC
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