133.131.6.0/24
At a glance
Addresses
/24 block
Visibility
79 of 80 vantage points
RPKI
Registry
JPAllocated 1st March 1997
AS paths to this prefix
All pathsOne observed path, hop by hop, from the origin out to Sao Paulo.
Seen from Sao Paulo
- Peer of AS63802seen on 983 paths from 70 vantage points
- Peer of AS7521seen on 2,540 paths from 141 vantage points
- Peer of AS55391seen on 3,377 paths from 141 vantage points
- Peer of AS2497seen on 22,890 paths from 34 vantage points
- Peer of AS3356seen on 997,311 paths from 2 vantage points
US
BROne path, hop by hop, from the origin outward to the vantage point that saw it. Counts beside each step are how often we see that pair adjacent anywhere in the table, not how often this path was used — BGP carries no traffic figures.
Every path we see
- Singapore638026939132337This path
- Oregon, US63802693920130This path
- London, UK63802752155391249712998529This path
- Sao Paulo6380275215539124973356266213Shown above
- Amsterdam63802752155391249717434549213151This path
Each row is one path genuinely present in the routing table at our last snapshot, read outward from the origin to the vantage point that saw it. Open a row to follow that one path hop by hop. A heavier line in the graph means more vantage points reach the prefix that same way.
Route visibility
99%
Seen by 79 of 80 full-feed vantage points
Globally propagatedObserved at 5 of our collectors.
What this percentage counts
The denominator counts only full-feed peers — peers carrying a substantially complete routing table at the moment of the snapshot. IXP route-server peers usually feed partial tables and are excluded, because including them would make a normally propagated prefix look as though half the internet could not see it.
It measures how widely an announcement has spread across the networks we can observe. It says nothing about whether the prefix is reachable from any particular place, or how it performs.
Registry and RPKI
- RIR
- APNIC — Asia-Pacific
- Country
- Japan
- Allocated
- 1st March 1997
- Allocation block
- 133.0.0.0/8
- Status
- allocated
- Origin validation
- No ROA
No ROA covers this prefix, so RPKI has nothing to say about it either way. This is still the common case for a large share of the routing table.
Prefix hierarchy
Announcements above, below and beside this one in the real routing table.
Left to right is specificity: a shorter mask covering more address space, then this prefix, then the announcements carved out inside it. Only the first few of each are drawn — the tables below list them all.
Covering announcements
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 133.131.0.0/16 | 65.5k | AS63802Nippon Telegraph and Telephone East Corporation | 79/80 |
More specific announcements
Nothing inside this block is announced separately.
Sibling prefixes
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 133.131.7.0/24 | 256 | AS63802Nippon Telegraph and Telephone East Corporation | 79/80 |
History
- AS6380212th August 2026 — present
Why these dates start where they do
A first-seen date is the first time we saw that origin, not the first time it appeared in BGP. Our history is forward-only with no backfill, so it says nothing about the period before we started collecting — treat the earliest dates with suspicion.
Open 133.131.6.0/24 in the calculator/24 reference
Routing data derived from RouteViews MRT archives and public registry data.