Home ASN LookupAS204666

AS204666 TLAPNET-CZ Jiri Tlapak

🇨🇿

Org handle: ORG-JT76-RIPE

RIPE NCCallocated

Announced Prefixes (BGP)

49total

38 IPv411 IPv6

IPv4 Addresses

Allocated (RIR)16,640

Announced (BGP)20,736

IPv6 Addresses

Allocated (RIR)5.7×10³⁰

Announced (BGP)5.7×10³⁰

Prefix Limit (IPv4)

100

Prefix Limit (IPv6)

Country

🇨🇿 CZ

RIR

RIPE NCC

Status

allocated

Allocated

2018-01-29

Announced Prefixes

(BGP)49

Prefix	RPKI	IRR	Last Seen
5.59.102.0/23	Valid	RIPE	2026-10-11
37.221.240.0/20	Valid	RIPE	2026-10-11
37.221.241.0/24	Valid	RIPE	2026-10-11
37.221.242.0/24	Valid	RIPE	2026-10-11
37.221.243.0/24	Valid	RIPE	2026-10-11
37.221.245.0/24	Valid	RIPE	2026-10-11
37.221.247.0/24	Valid	RIPE	2026-10-11
37.221.248.0/24	Valid	RIPE	2026-10-11
37.221.249.0/24	Valid	RIPE	2026-10-11
37.221.250.0/24	Valid	RIPE	2026-10-11

1-10 of 49

1 / 5

Allocated Prefixes

(RIR)32

Prefix	Country	RIR	Status
5.59.102.0/23	🇨🇿 CZ	RIPE	assigned
37.221.240.0/20	🇨🇿 CZ	RIPENCC	allocated
37.221.245.0/24	🇨🇿 CZ	RIPE	assigned
37.221.252.0/24	🇨🇿 CZ	RIPE	assigned
45.153.192.0/22	🇨🇿 CZ	RIPENCC	allocated
85.255.88.0/22	🇨🇿 CZ	RIPENCC	allocated
91.224.90.0/23	🇨🇿 CZ	RIPENCC	assigned
176.119.192.0/24	🇨🇿 CZ	RIPENCC	allocated
185.19.0.0/22	🇨🇿 CZ	RIPENCC	allocated
185.64.220.0/22	🇨🇿 CZ	RIPENCC	allocated

1-10 of 32

1 / 4

All 49 announced prefixes of AS204666 →

BGP Neighbours

(seen in AS paths)

Upstreams (2)

Networks AS204666 hands its own prefixes to: transit providers, or peers at an exchange.

AS16019VODAFONE CZ Vodafone Czech Republic A.S26
AS47232ISPAlliance ISP Alliance A.S23

Downstreams (2)

Networks whose own prefixes AS204666 passes on: usually its customers.

AS197412ASBESKYDNET Jiri Tlapak3
AS210436ASITGLOBE IT Globe S.R.O1

ASPA

No ASPA

Abuse Contact

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 AS204666 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/204666

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

curl -s "https://api.ipctl.io/v1/asn/204666" | jq