Home Prefix Lookup81.0.192.0/18

81.0.192.0/18 - BGP Prefix

IPv4not announced RPKI Valid

CIDR

81.0.192.0/18

IP Version

IPv4

Addresses

16.3K

Mask

/18 (255.255.192.0)

Country

🇨🇿 Czechia

City

Prague

Status

not announced

Allocated

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
This prefix is not announced as a whole. Parts of it are announced as more-specific prefixes, see below.

More-Specific Announcements

35 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
81.0.192.0/22	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.196.0/23	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.198.0/24	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.199.0/24	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.200.0/22	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.204.0/23	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.206.0/23	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.208.0/23	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.210.0/23	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.212.0/23	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.214.0/24	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.215.0/24	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.216.0/24	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.217.0/24	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.218.0/23	AS51167 CONTABO Contabo GmbH	Valid	-	2026-10-11
81.0.220.0/23	AS51167 CONTABO Contabo GmbH	Valid	-	2026-10-11
81.0.222.0/23	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.224.0/24	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.225.0/24	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.226.0/24	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.227.0/24	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.228.0/24	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.229.0/24	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.230.0/24	AS204383 CZ-SPCOM-AS SPCom s.r.o.	Valid	-	2026-10-11
81.0.231.0/24	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.232.0/21	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.240.0/23	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.242.0/23	AS204383 CZ-SPCOM-AS SPCom s.r.o.	Valid	-	2026-10-11
81.0.244.0/23	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.246.0/23	AS51167 CONTABO Contabo GmbH	Valid	-	2026-10-11
81.0.248.0/23	AS51167 CONTABO Contabo GmbH	Valid	-	2026-10-11
81.0.250.0/24	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11
81.0.251.0/24	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.252.0/23	AS21430 WIA-AS WIA spol. s.r.o.	Valid	-	2026-10-11
81.0.254.0/23	AS15685 CASABLANCA-AS CASABLANCA INT a.s.	Valid	-	2026-10-11

More Specific Prefixes

100

Prefix	AS	Country	Status
81.0.192.0/22	AS15685	🇨🇿CZ	allocated
81.0.192.0/24		🇨🇿CZ	assigned
81.0.196.0/23	AS21430	🇨🇿CZ	allocated
81.0.196.0/24		🇨🇿CZ	assigned
81.0.198.0/24	AS21430	🇨🇿CZ	allocated
81.0.198.0/26		🇨🇿CZ	assigned
81.0.198.64/27		🇨🇿CZ	assigned
81.0.198.96/27		🇨🇿CZ	assigned
81.0.198.128/27		🇨🇿CZ	assigned
81.0.198.192/27		🇨🇿CZ	assigned
81.0.198.224/27		🇨🇿CZ	assigned
81.0.199.0/24	AS15685	🇨🇿CZ	allocated
81.0.200.0/22	AS21430	🇨🇿CZ	allocated
81.0.204.0/23	AS21430	🇨🇿CZ	allocated
81.0.204.0/24		🇨🇿CZ	assigned
81.0.206.0/23	AS15685	🇨🇿CZ	allocated
81.0.206.0/27		🇨🇿CZ	assigned
81.0.206.32/27		🇨🇿CZ	assigned
81.0.206.64/27		🇨🇿CZ	assigned
81.0.206.96/27		🇨🇿CZ	assigned
81.0.206.128/27		🇨🇿CZ	assigned
81.0.206.192/26		🇨🇿CZ	assigned
81.0.208.0/23	AS15685	🇨🇿CZ	allocated
81.0.208.0/24		🇨🇿CZ	assigned
81.0.209.0/26		🇨🇿CZ	assigned
81.0.209.64/26		🇨🇿CZ	assigned
81.0.209.128/26		🇨🇿CZ	assigned
81.0.209.192/26		🇨🇿CZ	assigned
81.0.210.0/23	AS21430	🇨🇿CZ	allocated
81.0.211.96/27		🇨🇿CZ	assigned
81.0.211.128/26		🇨🇿CZ	assigned
81.0.211.224/27		🇨🇿CZ	assigned
81.0.212.0/23	AS15685	🇨🇿CZ	allocated
81.0.212.0/27		🇨🇿CZ	assigned
81.0.212.32/27		🇨🇿CZ	assigned
81.0.212.192/27		🇨🇿CZ	assigned
81.0.214.0/24	AS15685	🇨🇿CZ	allocated
81.0.215.0/24	AS21430	🇨🇿CZ	allocated
81.0.216.0/24	AS21430	🇨🇿CZ	allocated
81.0.217.0/24	AS15685	🇨🇿CZ	allocated
81.0.217.0/25		🇨🇿CZ	assigned
81.0.217.128/25		🇨🇿CZ	assigned
81.0.218.0/23	AS51167	🇩🇪DE	allocated
81.0.220.0/23	AS51167	🇩🇪DE	allocated
81.0.222.0/23	AS21430	🇨🇿CZ	allocated
81.0.223.0/24		🇨🇿CZ	assigned
81.0.224.0/24	AS21430	🇨🇿CZ	allocated
81.0.224.96/27		🇨🇿CZ	assigned
81.0.224.128/27		🇨🇿CZ	assigned
81.0.225.0/24	AS15685	🇨🇿CZ	allocated
81.0.225.128/27		🇨🇿CZ	assigned
81.0.225.192/27		🇨🇿CZ	assigned
81.0.226.0/24	AS15685	🇨🇿CZ	allocated
81.0.227.0/24	AS21430	🇨🇿CZ	allocated
81.0.227.96/27		🇨🇿CZ	assigned
81.0.228.0/24	AS15685	🇨🇿CZ	allocated
81.0.228.0/25		🇨🇿CZ	assigned
81.0.229.0/24	AS21430	🇨🇿CZ	allocated
81.0.229.0/27		🇨🇿CZ	assigned
81.0.229.32/27		🇨🇿CZ	assigned
81.0.229.128/26		🇨🇿CZ	assigned
81.0.230.0/23	AS15685	🇨🇿CZ	allocated
81.0.230.0/24	AS204383	🇨🇿CZ	assigned
81.0.232.0/21	AS15685	🇨🇿CZ	allocated
81.0.232.0/26		🇨🇿CZ	assigned
81.0.232.128/27		🇨🇿CZ	assigned
81.0.233.0/26		🇨🇿CZ	assigned
81.0.233.64/26		🇨🇿CZ	assigned
81.0.234.96/27		🇨🇿CZ	assigned
81.0.234.192/27		🇨🇿CZ	assigned
81.0.235.0/24		🇨🇿CZ	assigned
81.0.236.64/27		🇨🇿CZ	assigned
81.0.236.96/27		🇨🇿CZ	assigned
81.0.236.160/27		🇨🇿CZ	assigned
81.0.236.192/27		🇨🇿CZ	assigned
81.0.237.160/27		🇨🇿CZ	assigned
81.0.240.0/22	AS15685	🇨🇿CZ	allocated
81.0.240.0/25		🇨🇿CZ	assigned
81.0.240.128/27		🇨🇿CZ	assigned
81.0.240.160/27		🇨🇿CZ	assigned
81.0.240.192/26		🇨🇿CZ	assigned
81.0.242.0/23	AS204383	🇨🇿CZ	assigned
81.0.244.0/23	AS21430	🇨🇿CZ	allocated
81.0.245.96/27		🇨🇿CZ	assigned
81.0.245.128/26		🇨🇿CZ	assigned
81.0.245.224/27		🇨🇿CZ	assigned
81.0.246.0/23	AS51167	🇩🇪DE	allocated
81.0.248.0/23	AS51167	🇩🇪DE	allocated
81.0.250.0/24	AS15685	🇨🇿CZ	allocated
81.0.250.0/25		🇨🇿CZ	assigned
81.0.250.128/25		🇨🇿CZ	assigned
81.0.251.0/24	AS21430	🇨🇿CZ	allocated
81.0.252.0/23	AS21430	🇨🇿CZ	allocated
81.0.253.32/27		🇨🇿CZ	assigned
81.0.254.0/23	AS15685	🇨🇿CZ	allocated
81.0.254.0/27		🇨🇿CZ	assigned
81.0.254.96/27		🇨🇿CZ	assigned
81.0.254.160/27		🇨🇿CZ	assigned
81.0.254.192/27		🇨🇿CZ	assigned
81.0.254.224/27		🇨🇿CZ	assigned

Transfer History

Registry transfers of 81.0.192.0/18, blocks inside it, or blocks containing it.

81.0.248.0/23Transfer · 2022-11-16
CASABLANCA INT a.s.
RIPE NCC
→
TerraTransit AG
RIPE NCC
81.0.246.0/23Transfer · 2022-11-16
CASABLANCA INT a.s.
RIPE NCC
→
TerraTransit AG
RIPE NCC
81.0.220.0/23Transfer · 2022-11-16
CASABLANCA INT a.s.
RIPE NCC
→
TerraTransit AG
RIPE NCC
81.0.218.0/23Transfer · 2022-11-16
CASABLANCA INT a.s.
RIPE NCC
→
TerraTransit AG
RIPE NCC
81.0.252.0/23Transfer · 2022-07-28
CASABLANCA INT a.s.
RIPE NCC
→
WIA spol. s.r.o.
RIPE NCC
81.0.251.0/24Transfer · 2022-07-28
CASABLANCA INT a.s.
RIPE NCC
→
WIA spol. s.r.o.
RIPE NCC
81.0.244.0/23Transfer · 2022-07-28
CASABLANCA INT a.s.
RIPE NCC
→
WIA spol. s.r.o.
RIPE NCC
81.0.229.0/24Transfer · 2022-07-28
CASABLANCA INT a.s.
RIPE NCC
→
WIA spol. s.r.o.
RIPE NCC
81.0.227.0/24Transfer · 2022-07-28
CASABLANCA INT a.s.
RIPE NCC
→
WIA spol. s.r.o.
RIPE NCC
81.0.224.0/24Transfer · 2022-07-28
CASABLANCA INT a.s.
RIPE NCC
→
WIA spol. s.r.o.
RIPE NCC

Date	Resource	From	To	Type
2022-11-16	81.0.248.0/23	CASABLANCA INT a.s. RIPE NCC	TerraTransit AG RIPE NCC	Transfer
2022-11-16	81.0.246.0/23	CASABLANCA INT a.s. RIPE NCC	TerraTransit AG RIPE NCC	Transfer
2022-11-16	81.0.220.0/23	CASABLANCA INT a.s. RIPE NCC	TerraTransit AG RIPE NCC	Transfer
2022-11-16	81.0.218.0/23	CASABLANCA INT a.s. RIPE NCC	TerraTransit AG RIPE NCC	Transfer
2022-07-28	81.0.252.0/23	CASABLANCA INT a.s. RIPE NCC	WIA spol. s.r.o. RIPE NCC	Transfer
2022-07-28	81.0.251.0/24	CASABLANCA INT a.s. RIPE NCC	WIA spol. s.r.o. RIPE NCC	Transfer
2022-07-28	81.0.244.0/23	CASABLANCA INT a.s. RIPE NCC	WIA spol. s.r.o. RIPE NCC	Transfer
2022-07-28	81.0.229.0/24	CASABLANCA INT a.s. RIPE NCC	WIA spol. s.r.o. RIPE NCC	Transfer
2022-07-28	81.0.227.0/24	CASABLANCA INT a.s. RIPE NCC	WIA spol. s.r.o. RIPE NCC	Transfer
2022-07-28	81.0.224.0/24	CASABLANCA INT a.s. RIPE NCC	WIA spol. s.r.o. RIPE NCC	Transfer

View all 19 transfers →

Geolocation

Country🇨🇿CzechiaCZ

RegionHlavní město Praha

CityPrague

Coordinates50.0781, 14.4721 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfer marketTransfers published by all five RIRs

API

Open

GEThttps://api.ipctl.io/v1/prefix/81.0.192.0/18

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/81.0.192.0/18" | jq

External Links

RIPEstat