AS131591
Ambit Microsystem Corporation
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
- Enterprise allocation +4
- Trust score 69 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
AS131591 — global IP footprint
Cities where AS131591 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS131591 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 |
|---|---|---|
| 223.22.128.0/22 | 5,734 | 2026-07-15 18:22:48 |
| 101.138.96.0/20 | 4,587 | 2026-07-24 00:04:08 |
| 101.138.48.0/20 | 4,565 | 2026-07-24 00:04:08 |
| 101.138.192.0/20 | 4,555 | 2026-07-24 00:04:08 |
| 101.138.208.0/20 | 4,552 | 2026-07-24 00:04:08 |
| 101.138.16.0/20 | 4,536 | 2026-07-24 00:04:08 |
| 101.138.176.0/20 | 4,524 | 2026-07-24 00:04:08 |
| 101.136.64.0/18 | 4,523 | 2026-07-24 00:04:08 |
| 101.138.112.0/20 | 4,519 | 2026-07-24 00:04:08 |
| 101.138.64.0/20 | 4,515 | 2026-07-24 00:04:08 |
| 101.138.240.0/20 | 4,508 | 2026-07-24 00:04:08 |
| 101.138.128.0/18 | 4,508 | 2026-07-24 00:04:08 |
| 101.138.0.0/18 | 4,508 | 2026-07-24 00:04:08 |
| 101.136.192.0/18 | 4,505 | 2026-07-24 00:04:08 |
| 101.138.128.0/20 | 4,503 | 2026-07-24 00:04:08 |
| 101.138.128.0/21 | 4,493 | 2026-07-24 00:04:32 |
| 101.138.64.0/18 | 4,493 | 2026-07-24 00:04:08 |
| 101.138.160.0/20 | 4,492 | 2026-07-24 00:04:08 |
| 101.136.0.0/18 | 4,490 | 2026-07-24 00:04:08 |
| 101.136.72.0/21 | 4,485 | 2026-07-24 00:04:32 |
| 101.138.144.0/20 | 4,482 | 2026-07-24 00:04:08 |
| 101.136.248.0/21 | 4,477 | 2026-07-24 00:04:32 |
| 101.136.112.0/21 | 4,477 | 2026-07-24 00:04:32 |
| 101.138.64.0/21 | 4,472 | 2026-07-24 00:04:32 |
| 101.136.80.0/21 | 4,470 | 2026-07-24 00:04:32 |
| 101.138.104.0/21 | 4,469 | 2026-07-24 00:04:32 |
| 101.138.88.0/21 | 4,460 | 2026-07-24 00:04:32 |
| 101.138.160.0/21 | 4,459 | 2026-07-24 00:04:32 |
| 101.136.176.0/21 | 4,456 | 2026-07-24 00:04:32 |
| 222.250.128.0/21 | 4,456 | 2026-07-24 00:04:08 |
| 101.138.224.0/20 | 4,455 | 2026-07-24 00:04:08 |
| 101.136.64.0/21 | 4,454 | 2026-07-24 00:04:32 |
| 101.138.32.0/20 | 4,454 | 2026-07-24 00:04:08 |
| 101.138.184.0/21 | 4,452 | 2026-07-24 00:04:32 |
| 222.250.16.0/21 | 4,449 | 2026-07-24 00:04:08 |
| 101.138.0.0/20 | 4,447 | 2026-07-24 00:04:08 |
| 101.136.120.0/21 | 4,445 | 2026-07-24 00:04:32 |
| 222.250.0.0/21 | 4,443 | 2026-07-24 00:04:08 |
| 101.138.80.0/20 | 4,437 | 2026-07-24 00:04:08 |
| 101.138.96.0/21 | 4,437 | 2026-07-24 00:04:32 |
| 101.136.128.0/18 | 4,434 | 2026-07-24 00:04:08 |
| 101.138.200.0/21 | 4,428 | 2026-07-24 00:04:32 |
| 101.138.0.0/21 | 4,428 | 2026-07-24 00:04:32 |
| 222.250.88.0/21 | 4,428 | 2026-07-24 00:04:08 |
| 222.250.0.0/18 | 4,427 | 2026-07-24 00:04:08 |
| 101.136.56.0/21 | 4,421 | 2026-07-24 00:04:32 |
| 101.138.32.0/21 | 4,411 | 2026-07-24 00:04:32 |
| 101.138.120.0/21 | 4,408 | 2026-07-24 00:04:32 |
| 101.138.80.0/21 | 4,405 | 2026-07-24 00:04:32 |
| 101.138.40.0/21 | 4,404 | 2026-07-24 00:04:32 |
Showing top 50 of 272 announced prefixes by sample volume.
Frequently Asked Questions
What is AS131591?
AS131591 is an Autonomous System Number assigned to Ambit Microsystem Corporation. 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 AS131591 announce?
AS131591 announces 412.4K IPv4 addresses distributed across 22 routed CIDR prefixes. The network is registered in Taiwan.
Who operates AS131591?
AS131591 is operated by Ambit Microsystem Corporation. The organization is based in Taiwan. You can view all IP ranges and related ASNs on the organization page.
What country is AS131591 registered in?
AS131591 is registered in Taiwan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
