131.182.0.0/16
At a glance
Addresses
/16 block
Visibility
79 of 80 vantage points
RPKI
Registry
USAllocated 23rd December 1988
AS paths to this prefix
All pathsOne observed path, hop by hop, from the origin out to Amsterdam.
Seen from Amsterdam
- Peer of AS270seen on 15,565 paths from 79 vantage points
- Peer of AS297seen on 6,154 paths from 43 vantage points
- Peer of AS2914seen on 136,115 paths from 3 vantage points
- Peer of AS34549seen on 716,762 paths from 2 vantage points
DEOne 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
- Oregon, US270297693920130This path
- Amsterdam270297291434549213151Shown above
- London, UK27029720933568529This path
- Sao Paulo2702972093356266213This path
- Singapore27029729148966132337This 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
- ARIN — North America
- Country
- United States
- Allocated
- 23rd December 1988
- Allocation block
- 131.182.0.0/16
- 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.
Covering announcements
No less specific announcement covers this prefix.
More specific announcements
Nothing inside this block is announced separately.
Sibling prefixes
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 131.183.0.0/16 | 65.5k | AS2025University of Toledo | 80/80 |
History
- AS27012th 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 131.182.0.0/16 in the calculator/16 reference
Routing data derived from RouteViews MRT archives and public registry data.