Home ASN LookupAS197451

AS197451 VUTBR-AS Brno University of Technology

🇨🇿

Org handle: ORG-BUOT1-RIPE

RIPE NCCallocated

Announced Prefixes (BGP)

12total

8 IPv44 IPv6

IPv4 Addresses

Allocated (RIR)59,392

Announced (BGP)67,584

IPv6 Addresses

Allocated (RIR)9.5×10²⁹

Announced (BGP)1×10³⁰

Prefix Limit (IPv4)

100

Prefix Limit (IPv6)

Country

🇨🇿 CZ

RIR

RIPE NCC

Status

allocated

Allocated

2010-12-08

Announced Prefixes

(BGP)12

Prefix	RPKI	IRR	Last Seen
147.229.0.0/17	Valid	Other IRRRIPE	2026-10-09
147.229.128.0/18	Valid	Other IRRRIPE	2026-10-09
147.229.192.0/19	Valid	Other IRRRIPE	2026-10-09
147.229.224.0/19	Valid	Other IRRRIPE	2026-10-09
185.62.108.0/23	Valid	RIPE	2026-10-09
185.149.204.0/22	No ROA	RIPE	2026-10-09
185.149.204.0/24	No ROA	RIPE	2026-10-09
185.149.205.0/24	No ROA	RIPE	2026-10-09
2001:67c:1220::/46	Valid	RIPE	2026-10-09
2a03:2e0::/32	Valid	RIPE	2026-10-09

1-10 of 12

1 / 2

Allocated Prefixes

(RIR)10

Prefix	Country	RIR	Status
147.229.0.0/17	🇨🇿 CZ	RIPE	assigned
147.229.128.0/18	🇨🇿 CZ	RIPE	assigned
147.229.192.0/19	🇨🇿 CZ	RIPE	assigned
185.62.108.0/23	🇨🇿 CZ	RIPE	assigned
185.149.204.0/22	🇨🇿 CZ	RIPENCC	allocated
185.149.204.0/24	🇨🇿 CZ	RIPE	assigned
185.149.205.0/24	🇨🇿 CZ	RIPE	assigned
2001:67c:1220::/46	🇨🇿 CZ	RIPENCC	assigned
2a03:2e4::/30	🇨🇿 CZ	RIPE	assigned
2a07:6bc0::/29	🇨🇿 CZ	RIPENCC	allocated

All 12 announced prefixes of AS197451 →

BGP Neighbours

(seen in AS paths)

Upstreams (3)

Networks AS197451 hands its own prefixes to: transit providers, or peers at an exchange.

AS2852CESNET2 CESNET Z.S.P.O5
AS15935HA VEL LOCAL Ha Vel Internet S.R.O5
AS16019VODAFONE CZ Vodafone Czech Republic A.S2

Downstreams (7)

Networks whose own prefixes AS197451 passes on: usually its customers.

AS204860NETX Networks A.S15
AS207167Amccomp Master Brno Mapnet IT Services S.R.O5
AS201931LBNET LBnet.Cz S.R.O3
AS202872KMENET KME, Spol. S R. O3
AS34222ZONER A.S2
AS201263BRIX CDN Brno University Of Technology2
AS210604Asczpernix Neza Pernix Systems S.R.O2

Other adjacent networks (1)

Adjacent to AS197451 in the transit part of AS paths: peers, providers or customers.

AS24971MASTER MasterDC S.R.O1

ASPA

No ASPA

Abuse Contact

+31205354444

External Links

RIPE Whois RIPEstat

Learn more

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS197451 should publish an ASPA object
IPv4 transfers in the RIPE NCC regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Open

GEThttps://api.ipctl.io/v1/asn/197451

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/197451" | jq