AS19389 — GOLUB

AS19389 announces 3 IPv4 prefixes covering 768 addresses and 0 IPv6 prefixes.

About this network

GOLUB is the autonomous system handle for Golub Corporation, a private retail company operating discount supermarkets and pharmacies in New York.

What it's used for

• The address space carries mixed traffic, with reverse DNS entries for the 72.43.85.0/24 block pointing to syn-072-043-085-064.biz.spectrum.com, indicating business-class connectivity via Spectrum.
• The AS announces 768 IPv4 addresses across 3 prefixes and maintains 2 observed neighbours, a ratio consistent with a small-scale business or internal corporate estate rather than a transit or large access provider.

Notable

• Registrants do not fully align with the announcer; while 72.43.85.0/24 is registered to GOLUB CORPORATION, 63.138.94.0/24 is registered to Windstream Communications LLC and 173.226.249.0/24 to Level 3 Parent, LLC, suggesting leased or historically allocated space.
• The inventory consists of three distinct /24 blocks, with no IPv6 prefixes announced, reflecting a modest and segmented address footprint.

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

Announced prefixes

• 63.138.94.0/24
• 72.43.85.0/24
• 173.226.249.0/24

Upstream networks

• AS7029 Windstream Communications LLC
• AS13536 FirstLight Fiber, Inc.

Adjacent networks

• AS7029 Windstream Communications LLC
• AS13536 FirstLight Fiber, Inc.

Routing security

• RPKI: 2 valid, 0 invalid and 1 not-found announcements; 2 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 4 route objects.
• Listed in as-sets: AS-CHTR-SYNC, AS-HURRICANE, AS-NAVISITE-MA, AS-RR-BIZ, AS-TRANSROUTE-SPEC, AS-TVC, AS-WINDSTREAM-CUST, AS13536:AS-CONE, AS3770:AS-ALL.