AS17977
NF Park Bldg.3F, 9-15, Futaba 2-Chome
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 →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 203.173.64.0/20 | 4.1K |
0.0%
|
NF Park Bldg.3F, 9-15, Futaba 2-Chome | JP | — | — |
| 120.72.72.0/21 | 2.0K |
0.0%
|
NF Park Bldg.3F, 9-15, Futaba 2-Chome | JP | — | — |
| 120.72.68.0/22 | 1.0K |
0.0%
|
NF Park Bldg.3F, 9-15, Futaba 2-Chome | JP | — | — |
| 120.72.66.0/23 | 512 |
0.0%
|
NF Park Bldg.3F, 9-15, Futaba 2-Chome | JP | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS17977 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 |
|---|---|---|
| 203.173.64.0/20 | 8,172 | 2026-07-31 21:51:34 |
| 120.72.64.0/20 | 8,115 | 2026-07-31 22:52:21 |
Frequently Asked Questions
What is AS17977?
AS17977 is an Autonomous System Number assigned to NF Park Bldg.3F, 9-15, Futaba 2-Chome. 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 AS17977 announce?
AS17977 announces 7.7K IPv4 addresses distributed across 4 routed CIDR prefixes. The network is registered in Japan.
Who operates AS17977?
AS17977 is operated by NF Park Bldg.3F, 9-15, Futaba 2-Chome. The organization is based in Japan. You can view all IP ranges and related ASNs on the organization page.
What country is AS17977 registered in?
AS17977 is registered in Japan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
