Home ASN LookupAS201727

AS201727 AS_BUBAKOV Blond & Brown s.r.o.

🇨🇿

Org handle: ORG-BBS16-RIPE

RIPE NCCallocated

Announced Prefixes (BGP)

3total

2 IPv41 IPv6

IPv4 Addresses

Allocated (RIR)2,048

Announced (BGP)2,048

IPv6 Addresses

Allocated (RIR)3×10²⁶

Announced (BGP)3×10²⁶

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

🇨🇿 CZ

RIR

RIPE NCC

Status

allocated

Allocated

2014-08-01

Announced Prefixes

(BGP)3

Prefix	RPKI	IRR	Last Seen
45.140.240.0/22	No ROA	RIPE	2026-10-11
185.64.40.0/22	No ROA	RIPE	2026-10-11
2a03:1160::/40	No ROA	RIPE	2026-10-11

Allocated Prefixes

(RIR)3

Prefix	Country	RIR	Status
45.140.240.0/22	🇨🇿 CZ	RIPENCC	allocated
185.64.40.0/22	🇨🇿 CZ	RIPENCC	allocated
2a03:1160::/40	🇨🇿 CZ	RIPE	assigned

All 3 announced prefixes of AS201727 →

BGP Neighbours

(seen in AS paths)

Upstreams (1)

Networks AS201727 hands its own prefixes to: transit providers, or peers at an exchange.

AS15935HA VEL LOCAL Ha Vel Internet S.R.O3

Downstreams (1)

Networks whose own prefixes AS201727 passes on: usually its customers.

AS202556ASKRIVONET Blond & Brown S.R.O1

Transfer History

Registry transfers of AS201727 between organisations.

AS201727Transfer · 2023-07-14
Spolek bubakov.net
RIPE NCC
→
Blond & Brown s.r.o.
RIPE NCC

Date	Resource	From	To	Type
2023-07-14	AS201727	Spolek bubakov.net RIPE NCC	Blond & Brown s.r.o. RIPE NCC	Transfer

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 AS201727 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/201727

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

curl -s "https://api.ipctl.io/v1/asn/201727" | jq