Autonomous system detail

AS12

Announced

Operated by NYU-DOMAIN - New York University.

Summary

// analyst note
A live, well-connected R1 university network carrying benign academic traffic. Multiple NYU ASNs exist (US AS12 vs UAE AS50811) — attribute carefully by geography.
// security note
NEUTRAL/DATED: no notable public abuse signal found as of 2026-06-07; live academic network.
IPv4 prefixes
12
~164.1K addresses
IPv6 prefixes
1
announced
Peer networks
9
8 up · 1 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: High

AS12 is a legacy single-digit allocation registered under ARIN to New York University, and it remains a live, well-connected campus network. It announces the classic 128.122.0.0/16 (NYU-NET) block plus the 216.165.0.0/18 ranges (including 216.165.88.0/24 for NYU London) and IPv6 2607:f600::/32 — about 11 IPv4 prefixes and one IPv6 prefix, with six upstreams, ten peers, and a couple of downstreams. Transit comes from GTT (AS3257), Lumen/Level 3 (AS3356), and Zayo (AS6461), with additional connectivity via TIM/Telecom Italia, Consortium GARR, and COLT, plus regional peering with NYSERNet (AS3754). The ARIN ASN RegDate of 1984-07-05 is the registry date (the NYU-NET block 128.122.0.0/16 carries a 1986 RegDate). For triage this is a live R1 university network carrying benign academic traffic; note that NYU operates more than one ASN — US AS12 versus the RIPE-registered AS50811 (New York University Abu Dhabi, country AE) — so attribute by geography. No notable public abuse signal was found as of June 2026.

Operator
New York University (ARIN OrgId NYU-Z, ITS, New York, NY) [Confirmed] — ARIN RDAP
Country / RIR
US, ARIN [Confirmed]
Allocated
ARIN ASN RegDate 1984-07-05 (registry date; org refreshed 2023-05-15; 128.122.0.0/16 RegDate 1986-05-02) [Confirmed for shown date]
Org status
active — nyu.edu

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-07; live academic network — bgp.tools

Network & routing

Network type
research / education [Confirmed]
Size
~11 IPv4 prefixes, 1 IPv6; announces 128.122.0.0/16, 216.165.0.0/18, 2607:f600::/32 — bgp.he.net / bgp.tools (2026-06)
Routing/peering
actively announcing; 6 upstreams (GTT AS3257, Lumen AS3356, Zayo AS6461, + TIM AS3269, GARR AS137, COLT AS8220), ~10 peers incl. NYSERNet AS3754, 2 downstreams; RPKI partial/valid on announced prefixes — bgp.tools, bgpview.io
Notable usage
NYU campus network; announces classic NYU-NET 128.122.0.0/16 and 216.165.0.0/18 (incl. NYU London 216.165.88.0/24) — nyu.edu
Related ASNs
AS50811 (New York University Abu Dhabi, RIPE, country AE) [Confirmed]
Analyst note
A live, well-connected R1 university network carrying benign academic traffic. Multiple NYU ASNs exist (US AS12 vs UAE AS50811) — attribute carefully by geography.
[ 02 ] — Announced prefixes

What this network routes.

13 prefixes total · RIPEstat data · cached, not real-time
// IPv4 prefixes12
  1. 128.122.0.0/16/16
  2. 128.238.0.0/16/16
  3. 216.165.0.0/18/18
  4. 216.165.64.0/19/19
  5. 216.165.96.0/20/20
  6. 216.165.112.0/21/21
  7. 216.165.120.0/22/22
  8. 192.76.177.0/24/24
  9. 216.165.89.0/24/24
  10. 192.86.139.0/24/24
  11. 216.165.88.0/24/24
  12. 216.165.103.0/24/24
// IPv6 prefixes1
  1. 2607:f600::/32/32
[ 03 ] — Notable peers & upstreams

Who it talks to.

9 observed neighbours
// Notable connectionsTop 9 of 9
ASNOperatorRole
AS3257 GTT-BACKBONE GTT Communications Inc. upstream
AS3356 LEVEL3 - Level 3 Parent, LLC upstream
AS6461 ZAYO-6461 - Zayo Bandwidth upstream
AS3269 ASN-IBSNAZ Telecom Italia S.p.A. upstream
AS8220 COLT COLT Technology Services Group Limited upstream
AS137 ASGARR Consortium GARR upstream
AS3754 NYSERNET3-AS - NYSERNet upstream
AS286 KPN GTT Communications Inc. upstream
AS394666 NYU-HOSPITALS-CENTER - NYU Langone Health downstream
Neighbours observed via public BGP collectors; not a complete peering list.