Tomas Oliveira Valente Leite de Castro
AS200454 is Tomas Oliveira Valente Leite de Castro (leitecastro.com). It announces 512 IPv4 addresses in 2 prefixes, and 3 IPv6 prefixes.
Portugal· RIPE· allocated 2022-12-19· education
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- United States448 · 87.50%
- Portugal64 · 12.50%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- TOM-AS
- name
- Tomas Oliveira Valente Leite de Castro
- org
- ORG-TOVL1-RIPE
- org name
- Tomas Oliveira Valente Leite de Castro
- org address
- Avenida Elias Garcia 31, 4E, 1000-148 Lisbon, Portugal
- org country
- PT
- country
- PT
- source
- ripe
- status
- ASSIGNED
- created
- 2022-12-19
- updated
- 2025-10-03
- descr
- Tomas Oliveira Valente Leite de Castro
- remarks
- Some things in life can never be fully appreciated nor / understood unless experienced firsthand. Some things in / networking can never be fully understood by someone who neither / builds commercial networking equipment nor runs an operational / network. / For full list of Communities available please visit https://bgp.tools/communities/200454 / RPKI invalid routes are dropped / | Network Upstreams | / ------------------- Hurricane Electric LLC ------------------- / ------------------- Cogent Communications
- maintainer
- RIPE-NCC-END-MNT|CASTRO-MNT
- abuse name
- Abuse contact role object
- abuse email
- tomas.leite.castro@tecnico.ulisboa.pt
- abuse kind
- role
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- None here
- dataimpulse50.00%
- None here
- None here
- None here
- None here
- Hosting IP25650.00%
- None here
- None here
- None here
- 1.76%
- 0.20%
- 0.39%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 23.147.168.0/24 | United States | not found | 17 | 2026-10-02 |
| 131.143.87.0/24 | United States | valid | 17 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2602:faa5::/48 | United States | not found | 20 | 2026-10-02 |
| 2a0a:6040:aa00::/40 | Portugal | valid | 20 | 2026-10-02 |
| 2a0f:b241:10::/48 | Canada | valid | 20 | 2026-10-02 |
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