41.75.214.0/23
AS37440 is not currently observed originating this prefix. The origins we do see are listed above.
At a glance
Addresses
/23 block
Visibility
76 of 77 vantage points
RPKI
Registry
TZAllocated 31st August 2009
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 AS37133seen on 10,657 paths from 140 vantage points
- Peer of AS327708seen on 18,779 paths from 141 vantage points
- Peer of AS37662seen on 4,142 paths from 2 vantage points
RW
MU
AEOne 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
- Amsterdam37133327708376628298This path
- London, UK37133327708376628529Shown above
- Sao Paulo371333744032770837100645335280This path
- Singapore3713332770837662174349123673This path
- Oregon, US37133327708376625511693920130This 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
99%
Seen by 76 of 77 full-feed vantage points
Globally 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
- AFRINIC — Africa
- Country
- Tanzania
- Allocated
- 31st August 2009
- Allocation block
- 41.75.208.0/20
- 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.
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 |
|---|---|---|---|
| 41.75.208.0/20 | 4.1k | AS37133Airtel Tanzania | 77/77 |
More specific announcements
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 41.75.214.0/24 | 256 | AS37133Airtel Tanzania | 76/77 |
Sibling prefixes
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 41.75.212.0/23 | 512 | AS37133Airtel Tanzania | 76/77 |
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 41.75.214.0/23 in the calculator/23 reference
Routing data derived from RouteViews MRT archives and public registry data.