103.2.52.0/22
At a glance
Addresses
/22 block
Visibility
79 of 80 vantage points
RPKI
Registry
JPAllocated 20th April 2011
AS paths to this prefix
All pathsOne observed path, hop by hop, from the origin out to London, UK.
Seen from London, UK
- Peer of AS7524seen on 2,575 paths from 109 vantage points
- Peer of AS2519seen on 9,131 paths from 60 vantage points
- Peer of AS4637seen on 16,519 paths from 2 vantage points
HK
AEOne 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, US7524693920130This path
- London, UK7524251946378529Shown above
- Sao Paulo752425193356266213This path
- Singapore75242519174132337This path
- Amsterdam7524249717434549213151This 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
- 20th April 2011
- Allocation block
- 103.2.52.0/22
- 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.
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 |
|---|---|---|---|
| 103.2.48.0/22 | 1k | AS2527Sony Network Communications Inc. | 80/80 |
History
- AS752412th 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 103.2.52.0/22 in the calculator/22 reference
Routing data derived from RouteViews MRT archives and public registry data.