asn.dev

Autonomous system

AS27413 NTHL

Hosting ARIN

IPv4 addresses 256 1 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Network Transit Holdings LLC

United States of America · AI-generated

transit business zayo

NTHL is the AS handle for Network Transit Holdings LLC.

What it's used for

  • The space carries business infrastructure, evidenced by the reverse DNS entry criterionmachineworks.com and the netname NTHL.
  • The AS announces 256 IPv4 addresses and 1 IPv6 prefix with only 1 observed neighbour, a ratio that indicates a transit or peering role rather than an access network.

Notable

  • The registrant NETWORK TRANSIT HOLDINGS LLC matches the AS holder, with the netname NTHL confirming the identity.
  • Secondary sources associate this operator with Zayo, suggesting a corporate relationship or rebranding within the Zayo portfolio.
  • The address inventory is minimal, consisting of a single /24 block and one /36 IPv6 prefix, which is typical for a transit provider focused on peering rather than large-scale address allocation.

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS11042NETWORK TRANSIT HOLDINGS LLC92

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-20, 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 · 256 addresses IPv6 1 prefixes

CountryNamePrefixes
USUnited States of America2

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS27413
Registry name
NTHL
Registrant
NETWORK TRANSIT HOLDINGS LLC
Abuse contact
abuse@networktransit.net
Registered
2009-02-12
Last changed
2016-09-12
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 2 with no ROA
ROAs
0 authorising AS27413
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
2 naming AS27413

Reputation

Classification and threat

Hosting Datacenter or cloud provider. Addresses are servers, not people.

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 1,778 prefixes, as published 2026-10-20. 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