64.103.40.0/21 - CISCO SYSTEMS (AS109)
CIDR
64.103.40.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇬🇧 United Kingdom
City
London
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 64.103.40.0/21 | AS109 CISCOSYSTEMS - CISCO SYSTEMS, INC. | Valid | ARIN | 2026-10-11 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 64.103.0.0/16 | AS109 CISCOSYSTEMS - CISCO SYSTEMS, INC. | Valid | - | 2026-10-11 |
| 64.103.0.0/17 | AS109 CISCOSYSTEMS - CISCO SYSTEMS, INC. | Valid | - | 2026-10-11 |
Transfer History
Registry transfers of 64.103.40.0/21, blocks inside it, or blocks containing it.
- 64.100.0.0/14M&A ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 64.100.0.0/14 | M&A |
Origin ASN
AS109
CISCOSYSTEMS - CISCO SYSTEMS, INC.
Related Prefixes
Geolocation
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 ARIN regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/64.103.40.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/64.103.40.0/21" | jq
External Links