Autonomous system
AS10599 MCKESSON
Unclassified ARIN
Summary
McKesson Corporation
enterprise legacy
MCKESSON is McKesson Corporation, the American healthcare-supply-chain company that distributes a very large share of the pharmaceuticals dispensed in North America and sells the software and services that pharmacies, providers and payers run on. The sampled reverse DNS, vdas-east.mckesson.com, is first-party — the network is McKesson's own.
What it's used for
RIS observes 18 IPv4 prefixes carrying 147,968 addresses, no IPv6, and 7 observed BGP neighbours. The address count is genuinely large — bigger than plenty of ISPs in this range — but the peer count keeps it honest: seven neighbours is a multi-homed enterprise buying transit, not a network selling it.
The structure is corporate. There is a legacy 149.21.0.0/16, a 143.112.0.0/16-worth of space announced as its component /17s, /18s and /19s, and 206.203.64.0/18, with a further scattering of /24s punched out for traffic engineering. Deaggregating your own blocks like this is how a company with many sites and multiple carriers steers each one. Behind it sits the estate you would expect from a Fortune-10 firm: distribution centres, pharmacy systems, data centres, corporate offices and the extranets that connect them to customers.
Notable
At least one announced /24 sits in RIPE-region address space rather than ARIN's, which is what a multinational's routing looks like when European operations are announced from the same ASN as the US ones. A company can hold space from more than one registry without any of the address-brokerage implications that pattern sometimes carries — here, every block traces back to the same first-party operator.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
6 upstream, 0 downstream and 6 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 8 prefixes · 2.05K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 8 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10599- Registry name
- MCKESSON
- Registrant
- McKesson Corp.
- Abuse contact
- NetworkInfrastructureTeam2@mckesson.com
- Registered
- 1997-09-30
- Last changed
- 2000-05-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 33% valid · 3 valid, 6 with no ROA
- ROAs
- 5 authorising AS10599
- ASPA
- no ASPA record
- IRR
- 89% registered · 8 of 9 announcements
- Route objects
- 12 naming AS10599
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 443 networks and 1,784 prefixes, as published 2026-10-19. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere