$ query “AS21737” --type=asn → 1 result(s)
AS21737 · SPRINGNET2-NET
SpringNet
AS21737 belongs to SpringNet and is a residential access provider, established in the United States in 2001. The system announces a respectable 24 832 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to the United States.
Basic Information
- Country
- 🇺🇸 United States
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- June 18, 2001
- Last Changed
- October 03, 2026
- Last Seen
- October 21, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 10 / 5
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 24 832
- Largest IPv4 Prefix
- /19 (8 192 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇺🇸 United States (24 832 IPs)
- Prefix Changed
- April 30, 2026
Reputation
- Reputation
- Good — 1 flagged IPs out of 24 832 total (0.00%)
Connectivity Summary
- Upstream Providers
- 3 upstreams providing transit
- Peers
- 2 networks exchanging traffic without transit
- Downstream Customers
- 7 downstreams buying transit
- Degree
- 12 unique BGP neighbors
- Reach
- 7 networks in customer cone
Upstream Providers (3)
Prefix Lists
IPv4 Prefixes (10 total)
- 64.22.224.0/19 (8 192 addresses (/19 prefix))
- 66.119.0.0/19 (8 192 addresses (/19 prefix))
- 75.98.96.0/20 (4 096 addresses (/20 prefix))
- 76.77.128.0/20 (4 096 addresses (/20 prefix))
- 198.246.200.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (1 total)
- 2001:49b8::/32