163.253.77.0/24
At a glance
Addresses
/24 block
Visibility
61 of 81 vantage points
RPKI
Registry
USAllocated 21st October 1992
AS paths to this prefix
All pathsOne observed path, hop by hop, from the origin out to Amsterdam.
Seen from Amsterdam
- Peer of AS396955seen on 1,991 paths from 145 vantage points
- Peer of AS3356seen on 170,902 paths from 5 vantage points
- Peer of AS25091seen on 666,215 paths from 2 vantage points
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
- Sao Paulo1116435280This path
- London, UK396955335635280This path
- Singapore111646939132337This path
- Oregon, US11164693920130This path
- Amsterdam3969553356250918298Shown above
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
75%
Seen by 61 of 81 full-feed vantage points
Partially 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
- ARIN — North America
- Country
- United States
- Allocated
- 21st October 1992
- Allocation block
- 163.253.0.0/16
- 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.
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 |
|---|---|---|---|
| 163.253.76.0/24 | 256 | AS11164Internet2 I2PX | 2/81 |
| 163.253.76.0/24 | 256 | AS396955Internet2 | 79/81 |
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.
Open 163.253.77.0/24 in the calculator/24 reference
Routing data derived from RouteViews MRT archives and public registry data.