AS29990 — ASN-APPNEX

Network type: hosting

AS29990 announces 19 IPv4 prefixes covering 33,792 addresses and 8 IPv6 prefixes.

About this network

ASN-APPNEXUS is operated by Xandr Inc., the digital advertising exchange formerly known as AppNexus.

What it's used for

• The address space carries internal corporate infrastructure for ad exchange operations, evidenced by reverse DNS entries like bm-impbus.prod.fra1.adnexus.net and intdnsrecurse01.sin3.appnexus.net.
• With 33,792 IPv4 addresses announced across 36 prefixes and 19 observed neighbours, the ratio indicates a large-scale internal corporate estate rather than a transit or access network.

Notable

• Registrants consistently identify the holder as Xandr Inc. or its regional subsidiaries, such as AppNexus Singapore Pte. Ltd. and AppNexus Australia Pty Limited, aligning with the AS holder.
• AppNexus was rebranded to Xandr in 2021 following its acquisition by AT&T, which later divested the unit to a private equity consortium.
• The inventory includes a mix of US-based blocks and international segments, with netnames like LVLT-APPNEXUS-APPNE-64-210-56 reflecting historical Level 3 allocations.

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

Announced prefixes

• 37.252.160.0/20
• 43.250.0.0/22
• 64.208.136.0/22
• 64.208.141.0/24
• 64.210.56.0/21
• 68.67.128.0/18
• 103.43.88.0/22
• 103.243.220.0/23
• 103.243.223.0/24
• 104.254.148.0/22
• 172.83.92.0/24
• 185.33.220.0/22
• 185.83.140.0/24
• 185.83.142.0/23
• 185.89.208.0/22
• 192.190.7.0/24
• 204.13.192.0/21
• 216.252.164.0/23
• 216.252.166.0/24
• 2401:1f80:10::/44
• 2605:ee00::/43
• 2605:ee00:30::/44
• 2605:ee00:40::/44
• 2605:ee00:fff0::/44
• 2a00:d120:10::/44
• 2a00:d120:30::/44
• 2a03:84a0::/44

Upstream networks

• AS2914 NTT America, Inc.
• AS1299 Arelion Sweden AB
• AS174 Cogent Communications, LLC
• AS4637 Telstra Global
• AS6939 Hurricane Electric LLC
• AS12552 GlobalConnect AB
• AS30781 Free Pro SAS

Adjacent networks

• AS2914 NTT America, Inc.
• AS1299 Arelion Sweden AB
• AS174 Cogent Communications, LLC
• AS4637 Telstra Global
• AS6939 Hurricane Electric LLC
• AS12552 GlobalConnect AB
• AS30781 Free Pro SAS

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany
• AMS-IX Amsterdam — Amsterdam, Netherlands
• Equinix Internet Exchange Singapore — Singapore, Singapore
• Coresite - Any2 West — Los Angeles, United States
• Any2 California — Los Angeles, United States
• DE-CIX New York — New York, United States
• Equinix Internet Exchange New York — New York, United States