2001:503:231d::/48
Verisign Anycast CH 0CAS396661
Verisign Anycast FR 0CAS396707
Verisign Anycast SG 0DAS396729
Verisign Anycast BR 0EAS396659
Verisign Anycast JP 0CAS397199
Verisign Anycast SI 0AAS396690
Verisign Anycast CH 0AAS396761
Verisign Anycast DE 0CAS396747
Verisign Anycast FI 0BAS396662
Verisign Anycast DE 0GAS396560
Verisign Anycast BG 0AAS396735
Verisign Anycast CZ 0AAS396714
Verisign Anycast KW 0AAS396682
Verisign Anycast IN 0BAS396629
Verisign Anycast IE 0AAS396653
Verisign Anycast GB 0CAS396551
Verisign Anycast ZA 0AAS396642
Verisign Anycast AU 0AAS396738
Verisign Anycast RS 0AAS396625
Announced by more than one origin AS (MOAS).
At a glance
Subnets
/48 block
Visibility
11 of 64 vantage points
RPKI
Registry
USAllocated 3rd June 2004
AS paths to this prefix
One real path per vantage point, fanning out from the origin. Where two reach the prefix the same way, those hops are drawn once. Open a path to follow it hop by hop.
- Amsterdam3967142641532590This path
- Sao Paulo3966592641535280This path
- Singapore39672926415132337This 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
17%
Seen by 11 of 64 full-feed vantage points
Seen by few vantage pointsObserved at 3 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
- 3rd June 2004
- Allocation block
- 2001:503:231d::/48
- 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 |
|---|---|---|
| 2001:503:231d::/48 | AS10515 | /48 |
| 2001:503:231d::/48 | AS19836 | /48 |
| 2001:503:231d::/48 | AS20172 | /48 |
| 2001:503:231d::/48 | AS20431 | /48 |
| 2001:503:231d::/48 | AS211369 | /48 |
| 2001:503:231d::/48 | AS21313 | /48 |
| 2001:503:231d::/48 | AS22547 | /48 |
| 2001:503:231d::/48 | AS25485 | /48 |
| 2001:503:231d::/48 | AS26415 | /48 |
| 2001:503:231d::/48 | AS27544 | /48 |
| 2001:503:231d::/48 | AS32651 | /48 |
| 2001:503:231d::/48 | AS36616 | /48 |
| 2001:503:231d::/48 | AS36617 | /48 |
| 2001:503:231d::/48 | AS36618 | /48 |
| 2001:503:231d::/48 | AS36619 | /48 |
| 2001:503:231d::/48 | AS36620 | /48 |
| 2001:503:231d::/48 | AS36621 | /48 |
| 2001:503:231d::/48 | AS36622 | /48 |
| 2001:503:231d::/48 | AS36623 | /48 |
| 2001:503:231d::/48 | AS36624 | /48 |
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
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.