27.3.192.0/18
At a glance
Addresses
/18 block
Visibility
1 of 80 vantage points
RPKI
Registry
VNAllocated 11th March 2010
AS paths to this prefix
No AS paths are stored for this prefix. We keep the full path from one reference peer per collector rather than from every peer, so a prefix only has paths here once it has been seen by one of those peers.
Route visibility
1%
Seen by 1 of 80 full-feed vantage points
Seen by few vantage pointsObserved at 1 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
- Vietnam
- Allocated
- 11th March 2010
- Allocation block
- 27.2.0.0/15
- 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 |
|---|---|---|---|
| 27.2.0.0/15 | 131k | AS45543SaiGon Tourist cable Televition Company | 80/80 |
More specific announcements
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 27.3.192.0/20 | 4.1k | AS45543SaiGon Tourist cable Televition Company | 80/80 |
| 27.3.208.0/20 | 4.1k | AS45543SaiGon Tourist cable Televition Company | 80/80 |
| 27.3.224.0/20 | 4.1k | AS45543SaiGon Tourist cable Televition Company | 80/80 |
| 27.3.240.0/20 | 4.1k | AS45543SaiGon Tourist cable Televition Company | 80/80 |
Sibling prefixes
| Prefix | Addresses | Origin | Visibility |
|---|---|---|---|
| 27.3.128.0/18 | 16.4k | AS45543SaiGon Tourist cable Televition Company | 1/80 |
History
- AS4554312th 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.
Open 27.3.192.0/18 in the calculator/18 reference
Routing data derived from RouteViews MRT archives and public registry data.