asn.dev

Autonomous system

AS38927 NETBUILD-AS

Unclassified RIPE

IPv4 addresses 7.94K 6 prefixes
IPv6 prefixes 2 counted as prefixes, not addresses
Countries 1 mostly DE
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Net-Build GmbH

Germany · AI-generated

hosting datacenter business

The AS handle NETBUILD-AS is held by Net-Build GmbH.

What it's used for

  • The address space carries hosting and data center infrastructure, evidenced by netnames such as DE-NETBUILD-20110120 and DE-NETBUILD-20051111, and reverse DNS entries like arpa.netbuild.net and netrange-123.netbuild.net.
  • With 7,936 IPv4 addresses announced across 6 prefixes and only 2 observed neighbours, the ratio indicates a hosting or business network rather than a transit provider.
  • Traffic from this AS consists of server hosting, colocation, and data center services, as Net-Build GmbH operates data centers in Frankfurt and Saarwellingen providing cabinet racks, server hosting, and remote hands services.

Notable

  • Registrants for all announced prefixes are Net-Build GmbH, with specific netnames like PM-international and sponsorads associated with specific blocks, indicating internal segmentation or acquired assets.
  • The address inventory is finely subdivided into six distinct IPv4 prefixes and two IPv6 prefixes, consistent with an internal corporate estate or data center infrastructure.

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

2 upstream, 0 downstream and 4 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS9063VSE NET GmbH374
AS15965CEGECOM S.A.54

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, 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 6 prefixes · 7.94K addresses IPv6 2 prefixes

CountryNamePrefixes
DEGermany8

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS38927
Registry name
NETBUILD-AS
Registrant
NETBUILD-MNT
Abuse contact
abuse@netbuild.net
Registered
2005-11-15
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
88% valid · 7 valid, 1 with no ROA
ROAs
9 authorising AS38927
ASPA
2 declared providers
IRR
100% registered · 8 of 8 announcements
Route objects
11 naming AS38927

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: 442 networks and 1,782 prefixes, as published 2026-10-16. 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