asn.dev

Autonomous system

AS39278 CUSTOMIT-AS

Unclassified APNIC

IPv4 addresses 1.02K 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly FI
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

CustomIT Oy

Finland · AI-generated

business it-services consulting

CUSTOMIT-AS is operated by CustomIT Oy.

What it's used for

  • The address space is registered under the netname FI-CUSTOMIT-20180320 for CustomIT Oy, indicating a corporate allocation for internal use.
  • The AS announces a single IPv4 prefix, 185.250.132.0/22, comprising 1024 addresses, with no IPv6 prefixes in inventory.
  • With only 1 observed neighbour, the network functions as a stub or internal corporate estate rather than a transit or access provider.
  • Traffic from this AS consists of office workers and internal IT services endpoints for the consulting firm, not subscriber eyeballs or public web services.

Notable

  • The RDAP registrant CustomIT Oy matches the AS holder, confirming consistent ownership of the address space.
  • The inventory consists of a single contiguous /22 block, typical for a small-to-medium enterprise 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

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS47605FNE-Finland Oy60

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-30, 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 1 prefixes · 1.02K addresses IPv6 0 prefixes

CountryNamePrefixes
FIFinland1

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS39278
Registry name
CustomIT-AS
Registrant
fi-customit-1-mnt
Abuse contact
info@customit.fi
Registered
2018-06-01
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS39278
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS39278

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: 448 networks and 1,849 prefixes, as published 2026-10-30. 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