Autonomous system
AS32058 SBG-AS1
Unclassified ARIN
Summary
Sinclair Broadcast Group
broadcasting media corporate atsc3
SBG-AS1 is the autonomous system for Sinclair Broadcast Group, Inc.
What it's used for
- The address space carries internal corporate infrastructure for a major US television broadcaster, with reverse DNS entries pointing to
atsc3.com(e.g.,126.93.55.69.rtr.bltmmd.atsc3.com), indicating support for ATSC 3.0 next-generation TV transmission. - The AS announces 5376 IPv4 addresses across 10 prefixes and 2 IPv6 prefixes, while maintaining only 4 observed neighbours. This high address-to-neighbour ratio, combined with registrants pointing to a single corporation, indicates an internal corporate estate with site-by-site segmentation rather than an access or transit network.
Notable
- All registrants in the evidence pack are consistent with the announcer, listing either "Sinclair Broadcast Group, Inc." or "SINCLAIR BROADCAST GROUP INC." for prefixes such as
69.55.80.0/21and216.147.192.0/23. - The address inventory is finely subdivided into /23 and /24 blocks under netnames
SBG-NET4-01andSBG-NET4-02, reflecting a structured internal network design for a large media conglomerate.
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
Internet exchanges
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Megaport IX Ashburn | Ashburn, United States | 206.53.170.41 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 10 prefixes · 5.38K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 12 |
Registry
Allocation record
- Registry
- ARIN
- Registered
- 2004-02-18
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Sinclair Broadcast Group
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
- Peering policy
- Open
- Present at
- 1 exchanges
- Website
- https://sbgi.net/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 96% valid · 22 valid, 1 with no ROA
- ROAs
- 4 authorising AS32058
- ASPA
- no ASPA record
- IRR
- 96% registered · 22 of 23 announcements 1 other origin
- Route objects
- 19 naming AS32058
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: 431 networks and 1,768 prefixes, as published 2026-10-12. 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