AS21700
Neptune Networks, LLC
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 1 internet exchange: NYIIX New York
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 209.151.100.0/22 | 1.0K |
0.0%
|
Neptune Networks, LLC | US | — | — |
| 172.82.22.0/23 | 512 |
1.6%
|
Neptune Networks, LLC | US | — | — |
| 23.157.160.0/24 | 256 |
1.6%
|
Neptune Networks, LLC | US | New York | Brooklyn |
| 157.254.142.0/24 | 256 |
1.2%
|
Neptune Networks, LLC | US | — | — |
| 159.148.114.0/24 | 256 |
49.6%
|
Neptune Networks, LLC | LV | — | — |
| 192.109.165.0/24 | 256 |
1.6%
|
Neptune Networks, LLC | US | — | — |
| 216.74.121.0/24 | 256 |
1.6%
|
Neptune Networks, LLC | US | — | — |
| 216.126.57.0/24 | 256 |
1.6%
|
Neptune Networks, LLC | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS21700 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 23.157.160.0/24 | 17,158 | 2026-07-24 16:43:03 |
| 172.82.22.0/23 | 17,102 | 2026-07-24 16:43:03 |
| 209.151.100.0/22 | 16,981 | 2026-07-24 16:43:03 |
| 159.148.114.0/24 | 16,970 | 2026-07-24 16:43:03 |
| 157.254.142.0/24 | 16,928 | 2026-07-24 16:43:03 |
| 192.109.165.0/24 | 16,912 | 2026-07-24 16:43:03 |
| 216.74.121.0/24 | 16,836 | 2026-07-24 16:43:03 |
| 216.126.57.0/24 | 16,828 | 2026-07-24 16:43:03 |
Frequently Asked Questions
What is AS21700?
AS21700 is an Autonomous System Number assigned to Neptune Networks, LLC. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS21700 announce?
AS21700 announces 3.1K IPv4 addresses distributed across 8 routed CIDR prefixes. The network is registered in United States.
Who operates AS21700?
AS21700 is operated by Neptune Networks, LLC. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS21700 registered in?
AS21700 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
