AS21806 — NATIONAL-FUEL

AS21806 announces 3 IPv4 prefixes covering 768 addresses and 0 IPv6 prefixes.

About this network

The AS handle NATIONAL-FUEL is operated by National Fuel Gas Distribution Corporation.

What it's used for

• The address space carries internal corporate infrastructure for a natural gas utility, evidenced by netnames NFG and registrants National Fuel Gas Company.
• The inventory consists of 3 IPv4 prefixes totaling 768 addresses, with 2 observed neighbours, indicating a small, self-contained corporate network rather than a transit or access provider.

Notable

• Registrants for all announced prefixes are National Fuel Gas Company, which aligns with the registry holder National Fuel Gas Distribution Corporation.
• The address inventory is finely subdivided into three /24 blocks (205.235.160.0/24, 205.235.173.0/24, 205.235.175.0/24), consistent with site-by-site segmentation for a large utility.

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

Announced prefixes

• 205.235.160.0/24
• 205.235.173.0/24
• 205.235.175.0/24

Upstream networks

• AS46887 Crown Castle Fiber LLC
• AS11351 Charter Communications Inc

Adjacent networks

• AS46887 Crown Castle Fiber LLC
• AS11351 Charter Communications Inc

Routing security

• RPKI: 0 valid, 0 invalid and 3 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 4 route objects.
• Listed in as-sets: AS-CCF, AS-CCF-TEST, AS-CHTR-SYNC, AS-HURRICANE, AS-RR-BIZ, AS-WINDSTREAM-CUST, AS16657:AS-CUST.