2001:19e8:fa::/48
At a glance
Subnets
/48 block
Visibility
62 of 62 vantage points
RPKI
Registry
USAllocated 25th October 2004
AS paths to this prefix
All pathsOne observed path, hop by hop, from the origin out to Sao Paulo.
Seen from Sao Paulo
- Peer of AS2576seen on 3,646 paths from 142 vantage points
- Peer of AS13979seen on 4,568 paths from 142 vantage points
- Peer of AS4473seen on 7,100 paths from 142 vantage points
- Peer of AS7018seen on 21,400 paths from 7 vantage points
- Peer of AS12956seen on 476,587 paths from 4 vantage points
ESOne 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
- Amsterdam257613979447370186939213151This path
- Sao Paulo257613979447370181295632590Shown above
- Singapore257613979447370186939132337This path
- London, UK2576139794473701833561557651907This 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
100%
Seen by 62 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
- ARIN — North America
- Country
- United States
- Allocated
- 25th October 2004
- Allocation block
- 2001:19e8::/32
- 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 |
|---|---|---|---|
| 2001:19e8:fb::/48 | 65.5k × /64 | AS2576U. S. Department of Transportation | 62/62 |
History
- AS257612th 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.