AS21704 — ASN-21704

AS21704 announces 2 IPv4 prefixes covering 65,792 addresses and 0 IPv6 prefixes.

About this network

ASN-21704 is held by the New York City Department of Education.

What it's used for

• The address space carries internal network infrastructure for the NYC Public Schools system, evidenced by the netname NYCENET and reverse DNS entries pointing to nycboe.org.
• The AS announces 65,792 IPv4 addresses across 21 prefixes while maintaining only 1 observed neighbour, a ratio indicative of a large, self-contained internal corporate estate rather than a transit or access provider.

Notable

• All sampled registrants align with the announcer, consistently listing Department of Education; Abuse; NYCPS-DIIT under the netname NYCENET.
• The inventory is finely subdivided into 21 distinct prefixes, including a mix of /18, /19, /20, /21, /22, /23, and /24 blocks, reflecting site-by-site segmentation of the district's network.
• A single /24 prefix, 9.179.230.0/24, is announced alongside the primary 165.155.0.0/16 space, representing a distinct block within the inventory.

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

Announced prefixes

• 9.179.230.0/24
• 165.155.0.0/16

Upstream networks

• AS46887 Crown Castle Fiber LLC

Adjacent networks

• AS46887 Crown Castle Fiber LLC