Autonomous system
AS21942 -Reserved AS-
Unclassified ARIN
Summary
SCG Czech Design Center
business corporate czech
The AS handle is -Reserved AS- and the holder is SCG Czech Design Center, s.r.o.
What it's used for
- The space carries corporate infrastructure, evidenced by the netname
ON-SEMICONDUCTOR-NET1-PI-ROZ-CZand the registrantNetwork-NOC; SCG Czech Design Center, s.r.o. - The AS announces 256 IPv4 addresses across 1 prefix with 2 observed neighbours, indicating a small internal corporate estate rather than a transit or access network.
Notable
- The registrant
Network-NOC; SCG Czech Design Center, s.r.o.aligns with the corporate identity implied by the netname. - The address inventory consists of a single /24 block (91.199.164.0/24), representing a finely subdivided internal network segment.
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 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| Unknown | 1 |
Registry
Allocation record
- Registry
- ARIN
- Allocation
- reserved
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS21942
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS21942
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