AS30133ISC F-ROOT NUL0
United StatesRegistryARINAs of 27th September 2026, AS30133 (ISC F-ROOT NUL0), a network registered in the United States with ARIN, originates 39 IPv4 prefixes covering 10k addresses and 42 IPv6 prefixes. By IPv4 address space that makes it the 10,560th-largest of the 79,525 networks we see originating IPv4, and the 3,200th-largest of 18,428 in the United States. It is seen behind 1 upstream network, most often AS1280 (Internet Systems Consortium, Inc.). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS30133 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS30133 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.
Neighbouring networks
2
adjacent networks
- Upstreams
- 150%
- Peers
- 150%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS1280Internet Systems Consortium, Inc. | US | Peer | 5,847 | 145 |
Prefixes
All 81The largest blocks AS30133 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 103.11.221.0/24 | 256 | 81/81 |
| 192.158.250.0/24 | 256 | 81/81 |
| 192.158.251.0/24 | 256 | 81/81 |
| 192.228.80.0/24 | 256 | 81/81 |
| 192.228.81.0/24 | 256 | 81/81 |
| 192.228.82.0/24 | 256 | 81/81 |
| 192.228.83.0/24 | 256 | 81/81 |
| 192.228.84.0/24 | 256 | 81/81 |
| 192.228.85.0/24 | 256 | 81/81 |
| 192.228.87.0/24 | 256 | 81/81 |
Routing health
How AS30133's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.
RPKI origin validation
- Valid100.0%81
- Invalid0.0%0
- No ROA0.0%0
Propagation
- Globally propagated90% of full-feed peers or more100.0%81
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 39 prefixes
IPv6 — 42 prefixes
- /47131k × /642.4%1
- /4865.5k × /6497.6%41
Recent changes
Announcements that started or stopped since 28th Aug 2026.
No announcement by AS30133 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.