$ query “AS200454” --type=asn → 1 result(s)
AS200454 · TOM-AS
Tomas Oliveira Valente Leite de Castro
AS200454 is owned by Tomas Oliveira Valente Leite de Castro and is a residential access provider, registered in Portugal since 2022. The system announces 512 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in the United States.
Basic Information
- Country
- 🇵🇹 Portugal
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- December 19, 2022
- Last Changed
- October 01, 2026
- Last Seen
- October 10, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 2 / 2
- IPv6 Prefixes (raw / aggregated)
- 3 / 3
- IPv4 Addresses
- 512
- Largest IPv4 Prefix
- /24 (256 addresses)
- Largest IPv6 Prefix
- /40
- Geolocated Countries
- 🇺🇸 United States (512 IPs)
- Prefix Changed
- August 31, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 2 upstreams providing transit
- Peers
- 1 network exchanging traffic without transit
- Downstream Customers
- 2 downstreams buying transit
- Unclassified
- 1 unclassified BGP neighbor
- Degree
- 6 unique BGP neighbors
- Reach
- 2 networks in customer cone
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (2 total)
- 23.147.168.0/24 (256 addresses (/24 prefix))
- 131.143.87.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (3 total)
- 2a0a:6040:aa00::/40
- 2602:faa5::/48
- 2a0f:b241:10::/48