AS17025 — ZAYO-CUSTOMER-17025 - Zayo Bandwidth

AS17025 announces 42 IPv4 prefixes covering 14,848 addresses and 2 IPv6 prefixes.

About this network

ZAYO-CUSTOMER-17025 is operated by Zayo Bandwidth.

What it's used for

• The address space carries a mix of enterprise and educational traffic, evidenced by registrants such as Northwest Nazarene University (netnames NNU-2, NNU-199-104), BAE Systems Inc. (BAE-SYSTEMS-INC), and Siemens Industry Inc., Building Technology Division (ABOV-Z00020-64-124-134-0-24).
• With 14,592 IPv4 addresses announced across 42 prefixes and only 6 observed neighbours, the ratio suggests a transit or aggregation role rather than a large-scale access network, consistent with Zayo's infrastructure provider status.

Notable

• Registrants vary significantly from the announcer, including Northwest Nazarene University, BAE Systems Inc., Lansing Technology, Escalate, Siemens Industry Inc., TERRASPRING, and Latisys-Denver, LLC, indicating the AS aggregates space for multiple distinct customers.
• Zayo Bandwidth is the current holder, having acquired the assets of Level 3 Communications, which previously operated this AS number.
• The inventory includes two IPv6 prefixes (2001:438:38::/48, 2001:438:8022::/48) alongside a fragmented IPv4 estate with many /24 blocks.

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

Announced prefixes

• 64.124.13.0/24
• 64.124.47.0/24
• 64.124.134.0/24
• 64.124.213.0/24
• 64.125.169.0/24
• 64.125.227.0/24
• 64.125.229.0/24
• 64.201.237.0/24
• 66.46.216.0/24
• 69.147.1.0/24
• 69.147.3.0/24
• 69.147.5.0/24
• 69.147.6.0/24
• 129.220.4.0/24
• 149.32.156.0/23
• 159.18.249.0/24
• 159.18.250.0/24
• 164.74.122.0/23
• 164.74.125.0/24
• 164.74.129.0/24
• 198.60.208.0/21
• 199.104.0.0/21
• 199.127.37.0/24
• 204.87.173.0/24
• 205.209.193.0/24
• 205.209.195.0/24
• 205.209.196.0/24
• 207.235.135.0/24
• 208.184.24.0/24
• 208.184.52.0/24
• 208.184.64.0/24
• 208.184.136.0/24
• 208.185.127.0/24
• 209.133.100.0/24
• 209.133.102.0/24
• 209.249.51.0/24
• 209.249.71.0/24
• 209.249.103.0/24
• 212.196.214.0/24
• 213.152.249.0/24
• 213.152.253.0/24
• 216.200.251.0/24
• 2001:438:38::/48
• 2001:438:8022::/48

Upstream networks

• AS6461 Zayo Bandwidth
• AS15290 Zayo Bandwidth
• AS11427 Charter Communications Inc
• AS10753 Level 3 Parent, LLC
• AS812 Rogers Communications Canada Inc.
• AS2767 Zayo Bandwidth

Downstream networks

• AS401182 Applied Digital Corporation

Adjacent networks

• AS6461 Zayo Bandwidth
• AS401182 Applied Digital Corporation
• AS15290 Zayo Bandwidth
• AS11427 Charter Communications Inc
• AS10753 Level 3 Parent, LLC
• AS812 Rogers Communications Canada Inc.
• AS2767 Zayo Bandwidth

Routing security

• RPKI: 32 valid, 0 invalid and 21 not-found announcements; 49 ROAs.
• ASPA: none published.
• IRR: 28% of announcements registered; 28 route objects.
• Listed in as-sets: AS-CHTR-SYNC, AS-DATABANK, AS-HURRICANE, AS-HURRICANEV6, AS-MFNX, AS-PROLE, AS-ROGERS:AS-CUSTOMERS, AS-RR-BIZ, AS6461:AS-MFNX, AS8218:AS-CUSTOMERS, AS8218:AS-FR-CUSTOMERS.