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
- Multiple-origin (MOAS) routing anomaly −12
- Isp allocation +5
- Trust score 58 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 12 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS21887 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 23.106.148.0/22 | AS21887, AS25820 | 2026-07-18 11:37:44 |
| 74.82.208.0/22 | AS21887, AS25820 | 2026-07-18 11:37:44 |
| 69.171.65.0/24 | AS21887, AS25820 | 2026-07-18 11:37:44 |
| 192.84.9.0/24 | AS21887, AS25820 | 2026-07-18 11:37:44 |
| 74.82.212.0/22 | AS21887, AS25820 | 2026-07-18 11:37:44 |
| 74.82.200.0/22 | AS21887, AS25820 | 2026-07-18 11:37:44 |
| 142.0.42.0/24 | AS21887, AS25820 | 2026-07-18 11:37:44 |
| 74.82.204.0/22 | AS21887, AS25820 | 2026-07-18 11:37:44 |
| 74.82.216.0/22 | AS21887, AS25820 | 2026-07-18 11:37:44 |
| 185.199.241.0/24 | AS21887, AS25820 | 2026-07-17 19:22:38 |
| 74.82.220.0/22 | AS21887, AS25820 | 2026-07-17 19:22:38 |
| 74.82.192.0/22 | AS21887, AS25820 | 2026-07-17 17:37:37 |
Network profile
Source: PeeringDB →Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 74.82.192.0/19 | 8.2K |
0.0%
|
— | JP | Tokyo | Tokyo |
| 162.213.24.0/21 | 2.0K |
93.1%
|
Fiber Logic Inc. | CA | — | — |
| 23.106.148.0/22 | 1.0K |
80.6%
|
Fiber Logic Inc. | CA | — | — |
| 65.49.236.0/22 | 1.0K |
90.8%
|
Fiber Logic Inc. | CA | — | — |
| 65.49.144.0/24 | 256 |
93.8%
|
Fiber Logic Inc. | CA | — | — |
| 69.171.65.0/24 | 256 |
0.0%
|
— | JP | Tokyo | Tokyo |
| 185.199.241.0/24 | 256 |
89.5%
|
Fiber Logic Inc. | CA | — | — |
| 192.84.9.0/24 | 256 |
0.0%
|
— | JP | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS21887 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 |
|---|---|---|
| 23.106.148.0/22 | 56,093 | 2026-07-18 11:26:15 |
| 74.82.220.0/22 | 52,393 | 2026-07-18 11:27:01 |
| 74.82.208.0/22 | 51,995 | 2026-07-18 11:27:01 |
| 74.82.200.0/22 | 51,688 | 2026-07-18 11:27:01 |
| 74.82.196.0/22 | 51,206 | 2026-07-18 11:27:01 |
| 74.82.204.0/22 | 50,824 | 2026-07-18 11:27:01 |
| 74.82.192.0/22 | 50,824 | 2026-07-18 11:27:01 |
| 74.82.216.0/22 | 50,714 | 2026-07-18 11:27:01 |
| 74.82.212.0/22 | 49,848 | 2026-07-18 11:27:01 |
| 192.84.9.0/24 | 34,833 | 2026-07-18 11:27:01 |
| 65.49.236.0/22 | 33,495 | 2026-07-18 11:26:15 |
| 185.199.241.0/24 | 32,709 | 2026-07-18 11:26:15 |
| 69.171.65.0/24 | 31,106 | 2026-07-18 11:27:01 |
| 65.49.144.0/24 | 14,397 | 2026-05-31 23:56:57 |
| 162.213.30.0/24 | 11,405 | 2026-07-18 10:51:58 |
| 162.213.31.0/24 | 11,310 | 2026-07-18 11:07:34 |
| 162.213.26.0/24 | 11,308 | 2026-07-18 11:07:34 |
| 162.213.25.0/24 | 11,303 | 2026-07-18 10:51:58 |
| 162.213.27.0/24 | 11,219 | 2026-07-18 10:51:58 |
| 162.213.29.0/24 | 11,209 | 2026-07-18 11:07:34 |
| 162.213.28.0/24 | 11,133 | 2026-07-18 11:07:34 |
| 162.213.24.0/24 | 10,937 | 2026-07-18 10:51:58 |
| 74.82.202.0/24 | 10,640 | 2026-07-01 04:48:09 |
| 74.82.192.0/24 | 4,205 | 2026-06-30 16:58:40 |
| 23.106.148.0/24 | 3,337 | 2026-05-29 06:00:27 |
| 142.0.42.0/24 | 2,330 | 2026-07-18 01:12:30 |
| 142.0.43.0/24 | 2,330 | 2026-07-18 03:27:09 |
| 80.251.208.0/20 | 23 | 2026-06-27 00:57:35 |
| 199.168.136.0/22 | 23 | 2026-06-27 00:57:35 |
| 199.168.140.0/22 | 23 | 2026-06-27 00:57:35 |
| 162.244.243.0/24 | 23 | 2026-06-27 00:57:35 |
| 23.252.104.0/22 | 18 | 2026-07-08 03:35:13 |
| 185.199.240.0/24 | 17 | 2026-06-27 00:57:35 |
| 199.180.112.0/21 | 17 | 2026-06-27 00:57:35 |
| 74.211.96.0/21 | 17 | 2026-06-27 00:57:35 |
| 162.211.220.0/22 | 16 | 2026-06-27 00:57:35 |
| 64.64.228.0/22 | 15 | 2026-06-27 00:57:35 |
| 64.64.244.0/22 | 15 | 2026-06-27 00:57:35 |
| 64.64.232.0/22 | 15 | 2026-06-27 00:57:35 |
| 64.64.224.0/22 | 15 | 2026-06-27 00:57:35 |
| 64.64.236.0/22 | 15 | 2026-06-27 00:57:35 |
| 64.64.248.0/22 | 15 | 2026-06-27 00:57:35 |
| 64.64.240.0/22 | 15 | 2026-06-27 00:57:35 |
| 64.64.252.0/22 | 15 | 2026-06-27 00:57:35 |
| 192.69.92.0/22 | 14 | 2026-06-27 00:57:35 |
| 199.19.104.0/21 | 14 | 2026-06-27 00:57:35 |
| 162.244.240.0/24 | 14 | 2026-06-27 00:57:35 |
| 162.244.242.0/24 | 14 | 2026-06-27 00:57:35 |
| 74.211.104.0/21 | 14 | 2026-06-27 00:57:35 |
| 199.193.124.0/22 | 14 | 2026-06-27 00:57:35 |
Showing top 50 of 96 announced prefixes by sample volume.
Frequently Asked Questions
What is AS21887?
AS21887 is an Autonomous System Number assigned to Fiber Logic Inc.. 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 AS21887 announce?
AS21887 announces 4.6K IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in Japan.
Who operates AS21887?
AS21887 is operated by Fiber Logic Inc.. The organization is based in Japan. You can view all IP ranges and related ASNs on the organization page.
What country is AS21887 registered in?
AS21887 is registered in Japan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
