2001:4cc8::/31
At a glance
Subnets
/31 block
Visibility
61 of 62 vantage points
RPKI
Registry
CZAllocated 23rd June 2005
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 AS31246seen on 517 paths from 140 vantage points
- Peer of AS16246seen on 7,299 paths from 141 vantage points
- Peer of AS5610seen on 231 paths from 2 vantage points
- Peer of AS8220seen on 93,898 paths from 4 vantage points
- Peer of AS15576seen on 442,038 paths from 2 vantage points
GB
CHOne 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
- Singapore31246162465610132337This path
- Amsterdam312461624656106939213151This path
- London, UK3124616246561082201557651907Shown above
- Sao Paulo3124616246561012991295632590This 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
98%
Seen by 61 of 62 full-feed vantage points
Globally propagatedObserved at 4 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
- RIPE NCC — Europe, Middle East, Central Asia
- Country
- Czechia
- Allocated
- 23rd June 2005
- Allocation block
- 2001:4cc8::/31
- Status
- allocated
- Origin validation
- Valid
A ROA exists that authorises this origin AS to announce this prefix at this length.
ROAs covering this prefix
| ROA prefix | Authorised origin | Max length |
|---|---|---|
| 2001:4cc8::/31 | AS31246 | /31 |
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
No prefix of the same length in the same parent block is announced.
History
- AS3124612th 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.
Routing data derived from RouteViews MRT archives and public registry data.