$ query “AS16503” --type=asn → 1 result(s)
AS16503 — ZAYO-16503
Zayo Bandwidth
AS16503 is a stub network registered to Zayo Bandwidth, registered in the United States since 2000. The network announces a respectable 20 736 IPv4 addresses. No IPv6 support — it's 2026, just saying.
Basic Information
- Country
- 🇺🇸 United States
- Category
- Internet Service Provider
- Network Role
- Stub Network
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- May 04, 2000
- Last Changed
- March 04, 2026
- Last Seen
- March 05, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 4 / 4
- IPv6 Prefixes (raw / aggregated)
- 0 / 0
- IPv4 Addresses
- 20 736
- Largest IPv4 Prefix
- /19 (8 192 addresses)
- Geolocated Countries
- 🇺🇸 US (4 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 20 736 total (0.00%)
Connectivity Summary
- Upstream Providers
- 1 upstream autonomous systems providing transit
- Peers
- 0 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 0 downstream autonomous systems buying transit
- Degree
- 1 unique BGP neighbors (providers + customers + peers)
- Reach
- 0 — customer cone size measuring network influence
- Degree Rank
- #55 013
Upstream Providers (1)
- AS19092 — 360NETWORKS-US
Prefix Lists
IPv4 Prefixes (4 total)
- 64.20.96.0/19 (8 192 addresses)
- 66.45.192.0/19 (8 192 addresses)
- 216.178.48.0/20 (4 096 addresses)
- 64.124.127.0/24 (256 addresses)