SUBNET.IM

2607:b400:800::/40

Virginia Polytechnic Institute and State Univ.AS26499

At a glance

Subnets

16,777,216 × /64

/40 block

Visibility

100%

62 of 62 vantage points

RPKI

No ROA

Registry

ARINUS

Allocated 18th October 2010

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.

OriginVantage points
AS path graph: 4 observed paths to 2607:b400:800::/40, fanning out from AS26499 toward the vantage points that see it. Each path is written out in full beneath the graph.AS26499Virginia Polytech…OriginAS40220Virginia Polytech…AS6939Hurricane Electri…AS213151Christian ElsenAS51907Kanton ZugAS7195EdgeUnoAS32590Valve CorporationAS132337Axclusive
  1. Amsterdam26499402206939213151This path
  2. London, UK2649940220693951907This path
  3. Sao Paulo2649940220719532590This path
  4. Singapore26499402206939132337This 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

100%

Seen by 62 of 62 full-feed vantage points

Globally propagated

Observed 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
ARIN — North America
Country
United States
Allocated
18th October 2010
Allocation block
2607:b400::/32
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.

CoveringMore specific
Prefix hierarchy for 2607:b400:800::/40: the announcements covering it on the left, the announcements inside it on the right. Every prefix drawn is also listed in the tables below.2607:b400::/36AS402202607:b400::/32AS402202607:b400:800::/…AS26499This prefix2607:b400:800::/…AS26499

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

Announcements that contain 2607:b400:800::/40
PrefixAddressesOriginVisibility
2607:b400::/36268M × /64AS40220Virginia Polytechnic Institute and State Univ.31/62
2607:b400::/324.3B × /64AS40220Virginia Polytechnic Institute and State Univ.62/62

More specific announcements

Announcements contained within 2607:b400:800::/40
PrefixAddressesOriginVisibility
2607:b400:800::/4865.5k × /64AS26499Virginia Polytechnic Institute and State Univ.62/62

Sibling prefixes

No prefix of the same length in the same parent block is announced.

History

  1. AS2649912th 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.

Routing data derived from RouteViews MRT archives and public registry data.