AS19577 CASTRO TELECOM LLC 🇺🇸 US
Announcing 4 prefixes, seen at the RIS collectors.
IPv4 prefixes
2
1,280 (5 × /24)
IPv6 prefixes
2
257 × /48
Upstreams
2
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
1
transit customers observed
Customer cone
2
ASes reachable through it
Registry and operator data
- AS number
- AS19577
- Name
- CASTRO TELECOM LLC
- Organisation
- CASTRO TELECOM LLC
- Country
- 🇺🇸 US
- RIR
- ARIN
- Allocated
- 2024-06-14
- Scope
- Not Disclosed
- Peering policy
- Open
- Website
- http://tecnico.ulisboa.pt
- PeeringDB
- net/41864
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
4 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 208.85.8.0/22 v4 | no ROA | 42 | 244826241619577 | 2026-09-18 |
| 208.85.8.0/24 v4 | no ROA | 41 | 55720693920045419577 | 2026-09-18 |
| 2602:faa5:134::/48 v6 | no ROA | 33 | 377216241619577 | 2026-11-04 |
| 2602:faa5:b00::/40 v6 | no ROA | 33 | 377216241619577 | 2026-11-04 |