131.255.166.0/23
At a glance
Addresses
/23 block
Visibility
80 of 80 vantage points
RPKI
Registry
BRAllocated 17th December 2014
AS paths to this prefix
All pathsOne observed path, hop by hop, from the origin out to Oregon, US.
Seen from Oregon, US
- Peer of AS264522seen on 301 paths from 141 vantage points
- Peer of AS268267seen on 1,365 paths from 127 vantage points
- Peer of AS52965seen on 68,871 paths from 142 vantage points
- Peer of AS52320seen on 213,520 paths from 71 vantage points
- Peer of AS6939seen on 975,334 paths from 1 vantage point
CO
USOne 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
- London, UK264522268267148408529This path
- Sao Paulo264522268267262740266213This path
- Singapore26452226826714840132337This path
- Amsterdam26452226826752965523206939213151This path
- Oregon, US2645222682675296552320693920130Shown above
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
100%
Seen by 80 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
- LACNIC — Latin America and the Caribbean
- Country
- Brazil
- Allocated
- 17th December 2014
- Allocation block
- 131.255.164.0/22
- 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 |
|---|---|---|---|
| 131.255.164.0/22 | 1k | AS264522SEBASTIANA NUNES DOS SANTOS - ME | 80/80 |
More specific announcements
Nothing inside this block is announced separately.
Sibling prefixes
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 131.255.164.0/23 | 512 | AS264522SEBASTIANA NUNES DOS SANTOS - ME | 80/80 |
History
- AS26452212th 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 131.255.166.0/23 in the calculator/23 reference
Routing data derived from RouteViews MRT archives and public registry data.