AS7909 — CARMAX-AS

AS7909 announces 1 IPv4 prefixes covering 512 addresses and 0 IPv6 prefixes.

About this network

CARMAX-AS belongs to CarMax Enterprise Services, LLC, the technology and shared-services arm of CarMax, the largest used-car retailer in the United States, headquartered near Richmond, Virginia.

What it's used for

• Corporate networking for CarMax: stores, offices and the company's own customer-facing systems.
• A single directly-registered /23 (199.34.126.0/23, netname CESL-24), announced together with its two component /24s. About 512 addresses in all.

Notable

• Enterprise address space. A retailer of this size runs most of its estate behind private addressing and cloud services, so the public footprint is small.
• The low AS number is not early-internet pedigree. ARIN records both the ASN and the address block as registered in 2025, so AS7909 is a reissued number that came back into the free pool and was handed to a modern holder. Do not read a 1990s history into it.

Interesting

• This is a clean example of why a four-digit AS number tells you nothing on its own: neighbouring numbers in the same range are genuine 1997 legacy allocations, while this one is barely a year old.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 199.34.126.0/23

Upstream networks

• AS23005 SWITCH, LTD

Adjacent networks

• AS23005 SWITCH, LTD

Routing security

• RPKI: 0 valid, 0 invalid and 3 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 3 route objects.
• Listed in as-sets: AS-AS23005, AS3491:AS-CUSTOMERS-NA.