AS10599McKesson Corp.
United StatesRegistryARINAs of 27th September 2026, AS10599 (McKesson Corp.), a network registered in the United States with ARIN, originates 9 IPv4 prefixes covering 10.2k addresses. By IPv4 address space that makes it the 10,337th-largest of the 79,525 networks we see originating IPv4, and the 3,155th-largest of 18,428 in the United States. It is seen behind 6 upstream networks, most often AS15830 (Equinix, Inc.) and AS209 (Lumen (ex. Qwest)). 33% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 89% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS10599 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS10599 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.
Neighbouring networks
13
adjacent networks
- Upstreams
- 646%
- Peers
- 754%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS15830Equinix, Inc. |  NL | Peer | 247 | 81 |
| AS209Lumen (ex. Qwest) | US | Peer | 172 | 81 |
| AS3356Lumen (Level 3) | US | Peer | 148 | 81 |
| AS3549Lumen (fka. Global Crossing) | US | Peer | 45 | 45 |
| AS3910Lumen (ex Qwest Europe) | US | Peer | 36 | 36 |
| AS7018AT&T Enterprises, LLC | US | Peer | 1 | 1 |
Prefixes
The largest blocks AS10599 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 143.112.224.0/19 | 8.2k | 1/81 |
| 139.177.127.0/24 | 256 | 81/81 |
| 143.112.255.0/24 | 256 | 81/81 |
| 194.61.251.0/24 | 256 | 81/81 |
| 206.203.65.0/24 | 256 | 81/81 |
| 206.203.67.0/24 | 256 | 81/81 |
| 206.203.73.0/24 | 256 | 81/81 |
| 206.203.74.0/24 | 256 | 81/81 |
| 206.203.78.0/24 | 256 | 81/81 |
Routing health
How AS10599's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.
RPKI origin validation
- Valid33.3%3
- Invalid0.0%0
- No ROA66.7%6
Propagation
- Globally propagated90% of full-feed peers or more88.9%8
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%11.1%1
Prefix sizes
IPv4 — 9 prefixes
Recent changes
Announcements that started or stopped since 28th Aug 2026.
- Withdrawn143.112.0.0/1721st Sept 2026
- Withdrawn143.112.128.0/1821st Sept 2026
- Withdrawn143.112.128.0/2221st Sept 2026
- Withdrawn143.112.144.0/2221st Sept 2026
- Withdrawn143.112.192.0/1921st Sept 2026
- Withdrawn143.112.68.0/2221st Sept 2026
- Withdrawn143.112.76.0/2421st Sept 2026
- Withdrawn149.21.0.0/1621st Sept 2026
- Withdrawn206.203.64.0/1821st Sept 2026
- Withdrawn206.203.69.0/2421st Sept 2026
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.