2404:f4c0:f000::/44
TWD2 Education and Research NetworkAS24239
Announced by more than one origin AS (MOAS).
At a glance
Subnets
/44 block
Visibility
37 of 62 vantage points
RPKI
Registry
CNAllocated 13th June 2019
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 AS209300seen on 37 paths from 37 vantage points
- Peer of AS45576seen on 37 paths from 37 vantage points
- Peer of AS24239seen on 159 paths from 61 vantage points
- Peer of AS6939seen on 335,352 paths from 8 vantage points
USOne 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
- Amsterdam20930045576242396939213151This path
- London, UK2093004557624239693951907This path
- Sao Paulo2093004557624239693932590Shown above
- Singapore20930045576242396939132337This 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
60%
Seen by 37 of 62 full-feed vantage points
Partially 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
- APNIC — Asia-Pacific
- Country
- China
- Allocated
- 13th June 2019
- Allocation block
- 2404:f4c0::/32
- 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.
Left to right is specificity: a shorter mask covering more address space, then this prefix, then the announcements carved out inside it. Only the first few of each are drawn — the tables below list them all.
Covering announcements
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 2404:f4c0::/32 | 4.3B × /64 | AS24144Wuhan LSHIY Network Technology Co., Ltd. | 61/62 |
More specific announcements
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 2404:f4c0:f001::/48 | 65.5k × /64 | AS209300Wende Tan | 61/62 |
| 2404:f4c0:f002::/48 | 65.5k × /64 | AS209300Wende Tan | 61/62 |
Sibling prefixes
No prefix of the same length in the same parent block is announced.
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.
Routing data derived from RouteViews MRT archives and public registry data.