Autonomous system
AS10493 GCN-AS
Unclassified ARIN
Summary
Grand Central Networks Inc.
GCN-AS belongs to Grand Central Networks Inc., a very small US company (business listings put it at 14 Vanderventer Ave, Port Washington, New York, with a headcount in single figures). It should not be confused with GrandCentral, the VoIP startup Google turned into Google Voice, nor with Grand Central Station Internet Services (AS15251) — three unrelated holders sharing a name.
What it's used for
Running the company's own network estate, most of which physically sits in Chicago rather than at its registered New York address. RIS sees 6 announced IPv4 prefixes totalling 1,536 addresses: a contiguous 172.81.88.0/24–172.81.91.0/24 block, plus 74.201.43.0/24 and 50.31.163.0/24. No IPv6 is announced, and 2 neighbours are observed.
Notable
The single sampled PTR — chicago-pwr1.grand-central.net — is the most informative thing in the pack. It is first-party reverse DNS: the operator's own domain on its own router, in a Chicago facility. That matters because the prefix list otherwise has a slightly scattered look (three unrelated ARIN blocks for one tiny company), and scattered space with third-party or absent rDNS is how address-leasing shells present. Self-named infrastructure inside the range argues the opposite: a real, if minor, operator running its own kit.
With two upstreams and no peering to speak of, there is no transit role here. The honest read is a small hosting / network-services footprint — but the public evidence is thin, and this classification is held at low confidence rather than asserted.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 1.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10493- Registry name
- GCN-AS
- Registrant
- Grand Central Networks Inc.
- Abuse contact
- sean@gcnpublishing.com
- Registered
- 1997-08-27
- Last changed
- 1997-08-27
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 6 with no ROA
- ROAs
- 0 authorising AS10493
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 20 naming AS10493
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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