81.31.16.0/20 - BGP Prefix
IPv4RIPE NCCallocatedNo ROA
CIDR
81.31.16.0/20
IP Version
IPv4
Addresses
4K
Mask
/20 (255.255.240.0)
Country
π¨πΏ Czechia
City
Prague (Praha 3)
RIR
RIPE NCC
Status
allocated
Allocated
2003-05-19
Announced BGP Routes
0 of 0 routesRPKI:
IRR:
Swipe sideways to see all columns β
| 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. | ||||
Related Announcements
1 less-specific, 1 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.31.0.0/19 | AS3257 GTT-BACKBONE GTT Communications Inc. | No ROA | - | 2026-10-11 |
| 81.31.28.0/24 | AS397025 Alstom Alstom Transport SA | No ROA | - | 2026-10-11 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 81.31.16.0/24 | π¨πΏCZ | assigned | |
| 81.31.17.0/24 | π¦πͺAE | assigned | |
| 81.31.18.0/24 | ππ°HK | assigned | |
| 81.31.19.0/24 | ππ°HK | assigned | |
| 81.31.20.0/24 | ππ°HK | assigned | |
| 81.31.21.0/24 | ππ°HK | assigned | |
| 81.31.22.0/25 | πΊπΈUS | assigned | |
| 81.31.23.0/24 | π©πͺDE | assigned | |
| 81.31.24.0/24 | π©πͺDE | assigned | |
| 81.31.25.0/25 | π©πͺDE | assigned | |
| 81.31.25.128/25 | π©πͺDE | assigned | |
| 81.31.26.0/24 | π©πͺDE | assigned | |
| 81.31.27.0/24 | π©πͺDE | assigned | |
| 81.31.28.0/25 | π©πͺDE | assigned | |
| 81.31.28.128/25 | π©πͺDE | assigned | |
| 81.31.29.0/25 | AS3257 | π©πͺDE | assigned |
| 81.31.29.128/25 | π©πͺDE | assigned | |
| 81.31.30.0/24 | π©πͺDE | assigned | |
| 81.31.31.0/24 | π©πͺDE | assigned |
Transfer History
Registry transfers of 81.31.16.0/20, blocks inside it, or blocks containing it.
- 81.31.16.0/20Transfer Β·
Related Prefixes
Geolocation
Countryπ¨πΏCzechiaCZ
RegionHlavnΓ mΔsto Praha
CityPrague (Praha 3)
Coordinates50.0919, 14.4746 β
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 transfers in the RIPE NCC regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/81.31.16.0/20Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/81.31.16.0/20" | jq
External Links