136.121.4.0/24
At a glance
Addresses
/24 block
Visibility
55 of 81 vantage points
RPKI
Registry
USAllocated 27th August 2018
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 AS19527seen on 1,716 paths from 95 vantage points
- Peer of AS6453seen on 344,984 paths from 61 vantage points
- Peer of AS2914seen on 23,431 paths from 1 vantage point
- Peer of AS23352seen on 105,806 paths from 1 vantage point
One 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, UK195276453291435280This path
- Sao Paulo195276453291435280This path
- Singapore1952764539002132337This path
- Amsterdam19527435153257510888298This path
- Oregon, US19527645329142335220130Shown 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
68%
Seen by 55 of 81 full-feed vantage points
Partially 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
- 27th August 2018
- Allocation block
- 136.112.0.0/12
- Status
- allocated
- Origin validation
- Valid
A ROA exists that authorises this origin AS to announce this prefix at this length.
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 |
|---|---|---|---|
| 136.121.5.0/24 | 256 | AS19527Google LLC (Google Cloud) | 1/81 |
History
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 136.121.4.0/24 in the calculator/24 reference
Routing data derived from RouteViews MRT archives and public registry data.