asn.dev

Autonomous system

AS29197 LEHMAN-AS3

Unclassified RIPE

IPv4 addresses 4.86K 10 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly GB
Exchanges 0 recorded by PCH
Upstreams 3 0 downstream
Flagged prefixes 0 none

Summary

Nomura International Plc

United Kingdom · AI-generated

business finance corporate

The AS handle LEHMAN-AS3 is held by Nomura International Plc.

What it's used for

  • The address space carries corporate infrastructure for Nomura, evidenced by netnames NOM-US and EU-MAP-1 and registrants Nomura America Services, LLC and NOMURA HOLDING AMERICA INC.
  • The AS announces 4864 IPv4 addresses across 10 prefixes with only 3 observed neighbours, indicating a small, self-contained corporate estate rather than a transit or access network.

Notable

  • Registrants align with the announcer, listing Nomura America Services, LLC and NOMURA HOLDING AMERICA INC for the majority of prefixes.
  • The address inventory is finely subdivided into multiple /23 and /24 blocks, consistent with site-by-site segmentation for an internal corporate network.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

3 upstream, 0 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS198949Radware Ltd1,277
AS3356Level 3 Parent, LLC32
AS6461Zayo Bandwidth28

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-27, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 10 prefixes · 4.86K addresses IPv6 0 prefixes

CountryNamePrefixes
GBUnited Kingdom10

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS29197
Registry name
LEHMAN-AS3
Registrant
LEHMAN-MNT
Abuse contact
ripe-contacts@uk.nomura.com
Registered
2003-06-27
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 23 with no ROA
ROAs
0 authorising AS29197
ASPA
no ASPA record
IRR
30% registered · 7 of 23 announcements 15 other origin
Route objects
6 naming AS29197

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 447 networks and 1,852 prefixes, as published 2026-10-27. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check