AS19643 — NETSYN

AS19643 announces 7 IPv4 prefixes covering 1,792 addresses and 0 IPv6 prefixes.

About this network

The AS handle NETSYN is held by Network Synergy Corporation.

What it's used for

• The address space carries a mix of legacy Sprint and Cogent blocks, with netnames including SPRINT-CDA006-1, SPRINT-CDF612, SPRINT-CF2977, SPRINT-D01CB0, and COGC.
• The reverse DNS sample shows syn-071-088-062-064.biz.spectrum.com, indicating the space supports business customer connections via Spectrum infrastructure.
• With 1792 IPv4 addresses announced across 7 prefixes and only 3 observed neighbours, the low neighbour count suggests a limited peering footprint typical of a small business or internal corporate network rather than a transit provider.

Notable

• Registrants vary across the inventory: Charter Communications LLC holds the largest block, Network Synergy holds four blocks, and Cogent Communications, LLC holds one block.
• The address inventory consists of seven /24 prefixes, all located in the United States, with no IPv6 prefixes announced.
• The presence of Sprint and Cogent netnames alongside the Network Synergy registrant reflects historical address space transfers or acquisitions.

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

Announced prefixes

• 71.88.62.0/24
• 205.160.6.0/24
• 205.246.18.0/24
• 207.41.119.0/24
• 208.7.224.0/24
• 208.28.176.0/24
• 208.49.46.0/24

Upstream networks

• AS23132 Charter Communications LLC
• AS174 Cogent Communications, LLC
• AS46887 Crown Castle Fiber LLC

Adjacent networks

• AS23132 Charter Communications LLC
• AS174 Cogent Communications, LLC
• AS46887 Crown Castle Fiber LLC