asn.dev

Autonomous system

AS13833 ASN-NOS

Unclassified ARIN

IPv4 addresses 512 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Nos Communications

United States · AI-generated

telecom business isp

Both netnames pack an address into digits with the dots removed, and the two come out different lengths.

What it's used for

  • A telecommunications company's network. 512 addresses across two IPv4 prefixes, two observed BGP neighbours, and no IPv6 announced.

Notable

  • 70.103.75.0/24 is netname ELI-6323-70103750, three letters, an AS number, and the address with its separators stripped.
  • 70.103.230.0/24 is netname ELI-6323-701032300 by the same rule, one digit longer.
  • Both are registered to the same company; the first record also names an address administration contact.
  • 70.103.75.64 answers as message.textmorse.com, a domain matching neither the company nor the netnames.

Interesting

  • Stripping the dots out of an address makes the result impossible to read back. The two strings differ in length because one octet has three digits and the other has two, so nothing short of trying every split recovers the original. Padding each octet would have cost two characters and kept the label reversible.
  • The four-digit number sitting between the letters and the address is another network's number, which dates the assignment to whoever held the space before this company did.

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS3549Level 3 Parent, LLC62
AS7385Allstream Business US, LLC58

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-19, 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 2 prefixes · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America2

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS13833
Registry name
ASN-NOS
Registrant
Nos Communications
Abuse contact
jjackson@aninetworks.net
Registered
1999-08-24
Last changed
2019-12-05
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 2 valid, 0 with no ROA
ROAs
2 authorising AS13833
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
2 naming AS13833

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 1,783 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