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WorldIP.io
Autonomous System

AS52129

Proofpoint, Inc.

Proofpoint, Inc. United States 🌐 proofpoint.com
Announced IPs
11,520
CIDR prefixes
21
ASN
AS52129

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 →

Network profile

Source: PeeringDB →
Geographic scope Global
Traffic ratio Not Disclosed
Peering policy Open

Present at 2 internet exchanges: Equinix Frankfurt: Equinix IX - FR Metro, Equinix Amsterdam: Equinix IX - AM Metro

Website ↗

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
66.159.232.0/22 1.0K
97.3%
Proofpoint, Inc. US — —
66.159.244.0/22 1.0K
98.2%
Proofpoint, Inc. US — —
66.159.252.0/22 1.0K
26.1%
Proofpoint, Inc. US — —
143.55.144.0/22 1.0K
63.7%
Proofpoint, Inc. US — —
185.132.180.0/22 1.0K
83.0%
Proofpoint, Inc. GB — —
185.183.28.0/22 1.0K
84.6%
Proofpoint, Inc. US — —
66.159.224.0/23 512
10.2%
Proofpoint, Inc. US — —
66.159.232.0/23 512
97.7%
Proofpoint, Inc. DE — —
66.159.236.0/23 512
44.7%
Proofpoint, Inc. US — —
66.159.244.0/23 512
97.9%
Proofpoint, Inc. DE — —
66.159.246.0/23 512
98.6%
Proofpoint, Inc. NL — —
66.159.252.0/23 512
18.9%
Proofpoint, Inc. SA — —
66.159.254.0/23 512
33.2%
Proofpoint, Inc. AE — —
91.207.212.0/23 512
98.8%
Proofpoint, Inc. US — —
143.55.144.0/23 512
73.8%
Proofpoint, Inc. DE Hesse Frankfurt am Main
143.55.148.0/23 512
97.7%
Proofpoint, Inc. US — —
205.220.184.0/23 512
98.4%
Proofpoint, Inc. US — —
208.56.4.0/23 512
77.3%
Proofpoint, Inc. US — —
66.159.234.0/24 256
96.5%
Proofpoint, Inc. NL — —
66.159.235.0/24 256
97.3%
Proofpoint, Inc. DE — —
66.159.243.0/24 256
98.0%
Proofpoint, Inc. US — —
91.207.212.0/24 256
97.7%
Proofpoint, Inc. NL — —
91.207.213.0/24 256
100.0%
Proofpoint, Inc. US — —
91.209.104.0/24 256
80.1%
Proofpoint, Inc. US — —
143.55.146.0/24 256
97.7%
Proofpoint, Inc. DE — —
143.55.147.0/24 256
9.4%
Proofpoint, Inc. GB — —
143.55.150.0/24 256
96.9%
Proofpoint, Inc. US — —
185.169.148.0/24 256
3.1%
Proofpoint, Inc. IL — —
205.220.184.0/24 256
98.4%
Proofpoint, Inc. DE Hesse Frankfurt am Main
205.220.185.0/24 256
98.4%
Proofpoint, Inc. NL North Holland Amsterdam
208.56.0.0/24 256
50.4%
Proofpoint, Inc. US — —
208.56.4.0/24 256
97.7%
Proofpoint, Inc. DE — —
208.56.5.0/24 256
57.0%
Proofpoint, Inc. NL — —
208.56.6.0/24 256
20.7%
Proofpoint, Inc. US — —
208.56.7.0/24 256
0.0%
Proofpoint, Inc. US — —
208.56.17.0/24 256
50.4%
Proofpoint, Inc. US — —
208.84.64.0/24 256
94.9%
Proofpoint, Inc. US — —
208.86.200.0/24 256
94.1%
Proofpoint, Inc. US — —
91.209.104.128/25 128
80.5%
Proofpoint, Inc. NL — —
208.56.17.128/25 128
50.8%
Proofpoint, Inc. IN — —
91.209.104.0/26 64
79.7%
Proofpoint, Inc. NL North Holland Amsterdam
91.209.104.96/27 32
81.3%
Proofpoint, Inc. NL — —
91.209.104.64/28 16
81.3%
Proofpoint, Inc. NL — —
91.209.104.80/29 8
75.0%
Proofpoint, Inc. NL — —
208.56.17.48/29 8
50.0%
Proofpoint, Inc. IN — —
208.56.17.88/29 8
50.0%
Proofpoint, Inc. IN — —
208.56.17.120/29 8
50.0%
Proofpoint, Inc. IN — —
91.209.104.92/30 4
75.0%
Proofpoint, Inc. NL — —
208.56.17.0/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.8/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.20/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.32/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.44/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.56/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.76/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.84/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.100/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.116/30 4
50.0%
Proofpoint, Inc. IN — —
208.56.17.4/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.12/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.18/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.26/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.30/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.38/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.40/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.60/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.64/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.68/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.72/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.82/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.96/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.104/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.110/31 2
50.0%
Proofpoint, Inc. IN — —
208.56.17.114/31 2
50.0%
Proofpoint, Inc. IN — —
91.209.104.88/32 1
100.0%
Proofpoint, Inc. GB — —
91.209.104.89/32 1
100.0%
Proofpoint, Inc. NL — —
91.209.104.90/32 1
100.0%
Proofpoint, Inc. GB — —
91.209.104.91/32 1
100.0%
Proofpoint, Inc. NL — —
208.56.17.6/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.7/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.14/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.15/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.16/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.17/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.24/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.25/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.28/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.29/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.36/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.37/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.42/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.43/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.62/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.63/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.66/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.67/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.70/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.71/32 1
100.0%
Proofpoint, Inc. IN — —
208.56.17.74/32 1
100.0%
Proofpoint, Inc. US — —
208.56.17.75/32 1
100.0%
Proofpoint, Inc. IN — —

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS52129 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
208.56.0.0/24 135,897 2026-11-13 06:34:07
143.55.147.0/24 113,684 2026-11-13 08:12:19
66.159.237.0/24 110,249 2026-11-13 08:09:43
66.159.254.0/24 50,690 2026-11-13 08:17:06
66.159.236.0/24 48,524 2026-11-13 08:09:43
91.207.212.0/23 45,957 2026-11-13 08:10:28
185.183.30.0/24 44,802 2026-11-13 08:10:28
185.183.31.0/24 44,751 2026-11-13 08:10:28
91.209.104.0/24 44,653 2026-11-13 08:10:29
185.183.29.0/24 44,391 2026-11-13 08:10:28
66.159.246.0/24 43,990 2026-11-13 08:10:28
66.159.247.0/24 43,964 2026-11-13 08:10:28
66.159.243.0/24 43,752 2026-11-13 08:10:28
66.159.252.0/24 43,220 2026-11-13 04:21:14
185.183.28.0/22 42,706 2026-11-13 08:10:29
185.183.28.0/24 42,410 2026-11-13 08:10:28
208.56.5.0/24 41,460 2026-11-13 08:10:28
66.159.234.0/24 41,190 2026-11-13 08:10:28
66.159.255.0/24 39,778 2026-11-13 08:10:30
143.55.148.0/24 39,659 2026-11-13 08:10:28
143.55.150.0/24 39,285 2026-11-13 08:10:28
208.86.200.0/24 38,274 2026-11-13 08:10:28
208.56.17.0/24 38,215 2026-11-13 08:12:55
143.55.149.0/24 37,800 2026-11-13 08:10:28
66.159.253.0/24 26,011 2026-11-13 04:21:14
66.159.224.0/24 24,717 2026-11-13 08:11:35
205.220.185.0/24 23,142 2026-11-13 08:10:27
185.169.148.0/24 22,413 2026-11-13 08:12:19
66.159.225.0/24 21,884 2026-11-13 08:11:35
208.56.4.0/24 18,967 2026-11-13 08:10:28
208.56.6.0/24 18,932 2026-11-13 08:10:28
143.55.144.0/24 18,707 2026-11-13 08:10:28
185.132.182.0/24 18,570 2026-11-13 08:10:28
185.132.183.0/24 18,567 2026-11-13 08:10:28
185.132.180.0/24 18,549 2026-11-13 08:10:28
185.132.181.0/24 18,364 2026-11-13 08:10:28
143.55.146.0/24 17,375 2026-11-13 08:10:28
66.159.245.0/24 17,291 2026-11-13 08:10:28
66.159.244.0/24 17,277 2026-11-13 08:10:28
66.159.235.0/24 17,270 2026-11-13 08:10:28
66.159.232.0/24 17,210 2026-11-13 08:10:28
66.159.233.0/24 17,194 2026-11-13 08:10:28
143.55.145.0/24 17,006 2026-11-13 08:10:28
208.84.64.0/24 16,966 2026-11-13 08:10:28
205.220.184.0/24 16,949 2026-11-13 08:10:27
185.132.180.0/22 16,744 2026-11-13 08:10:28
208.56.18.0/24 1,207 2026-11-13 05:48:53
208.56.7.0/24 1,095 2026-11-13 08:10:28

Frequently Asked Questions

What is AS52129?

AS52129 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 AS52129 announce?

AS52129 announces 11.5K IPv4 addresses distributed across 21 routed CIDR prefixes. The network is registered in United States.

Who operates AS52129?

AS52129 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 AS52129 registered in?

AS52129 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: 2026-11-13 08:24:05 UTC
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