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
- Mobile allocation +2
- Trust score 67 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
AS17421 — global IP footprint
Cities where AS17421 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 AS17421 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 |
|---|---|---|
| 211.79.47.0/24 | 17,135 | 2026-07-21 17:52:43 |
| 211.79.34.0/24 | 14,632 | 2026-07-21 17:52:44 |
| 211.79.35.0/24 | 14,631 | 2026-07-21 17:52:44 |
| 111.71.222.0/24 | 12,963 | 2026-07-21 17:52:43 |
| 111.71.228.0/24 | 12,916 | 2026-07-21 17:53:15 |
| 111.71.230.0/24 | 12,621 | 2026-07-21 17:53:17 |
| 221.120.20.0/24 | 12,616 | 2026-07-21 17:52:44 |
| 221.120.41.0/24 | 12,453 | 2026-07-21 17:53:15 |
| 221.120.42.0/23 | 12,435 | 2026-07-21 17:53:15 |
| 221.120.40.0/24 | 12,429 | 2026-07-21 17:53:15 |
| 42.79.64.0/18 | 12,274 | 2026-07-21 17:52:44 |
| 111.71.229.0/24 | 12,222 | 2026-07-21 17:53:17 |
| 42.74.0.0/16 | 11,549 | 2026-07-21 18:09:15 |
| 111.71.227.0/24 | 11,549 | 2026-07-21 17:52:43 |
| 211.79.33.0/24 | 11,546 | 2026-07-21 17:53:16 |
| 42.76.192.0/18 | 11,301 | 2026-07-21 17:52:44 |
| 42.78.0.0/18 | 11,283 | 2026-07-21 17:53:15 |
| 42.78.128.0/18 | 11,258 | 2026-07-21 17:53:15 |
| 42.77.128.0/18 | 11,256 | 2026-07-21 17:53:15 |
| 42.77.0.0/18 | 11,247 | 2026-07-21 17:53:15 |
| 221.120.23.0/24 | 11,217 | 2026-07-21 17:53:15 |
| 223.139.0.0/18 | 11,212 | 2026-07-21 17:53:15 |
| 42.76.0.0/18 | 11,212 | 2026-07-21 17:52:44 |
| 42.71.64.0/18 | 11,193 | 2026-07-21 17:52:44 |
| 42.76.128.0/18 | 11,188 | 2026-07-21 17:52:44 |
| 42.76.64.0/18 | 11,183 | 2026-07-21 17:52:44 |
| 116.59.9.0/24 | 11,175 | 2026-07-21 17:52:43 |
| 111.81.192.0/18 | 11,172 | 2026-07-21 17:53:15 |
| 42.77.192.0/18 | 11,171 | 2026-07-21 17:52:44 |
| 42.73.0.0/17 | 11,170 | 2026-07-21 17:52:44 |
| 42.73.128.0/17 | 11,159 | 2026-07-21 17:52:44 |
| 42.79.0.0/18 | 11,159 | 2026-07-21 17:52:44 |
| 116.59.10.0/23 | 11,159 | 2026-07-21 17:52:43 |
| 116.59.8.0/24 | 11,150 | 2026-07-21 17:52:44 |
| 111.83.128.0/18 | 11,143 | 2026-07-21 17:52:44 |
| 42.79.128.0/19 | 11,142 | 2026-07-21 17:52:44 |
| 223.139.128.0/18 | 11,141 | 2026-07-21 17:53:15 |
| 223.138.0.0/19 | 11,140 | 2026-07-21 17:53:15 |
| 223.138.64.0/19 | 11,138 | 2026-07-21 17:53:15 |
| 223.143.224.0/21 | 11,137 | 2026-07-21 17:53:15 |
| 42.72.64.0/18 | 11,132 | 2026-07-21 17:52:44 |
| 223.143.160.0/19 | 11,127 | 2026-07-21 17:53:15 |
| 111.83.192.0/18 | 11,126 | 2026-07-21 17:52:44 |
| 111.83.64.0/18 | 11,123 | 2026-07-21 17:52:44 |
| 42.71.128.0/18 | 11,122 | 2026-07-21 17:52:44 |
| 111.71.0.0/18 | 11,122 | 2026-07-21 17:52:44 |
| 111.71.64.0/18 | 11,120 | 2026-07-21 17:52:44 |
| 111.70.0.0/18 | 11,116 | 2026-07-21 17:52:44 |
| 42.72.128.0/18 | 11,114 | 2026-07-21 17:52:44 |
| 42.79.192.0/19 | 11,109 | 2026-07-21 17:52:44 |
Showing top 50 of 191 announced prefixes by sample volume.
Frequently Asked Questions
What is AS17421?
AS17421 is an Autonomous System Number assigned to Mobile Business Group. 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 AS17421 announce?
AS17421 announces 1.66M IPv4 addresses distributed across 61 routed CIDR prefixes. The network is registered in Taiwan.
Who operates AS17421?
AS17421 is operated by Mobile Business Group. The organization is based in Taiwan. You can view all IP ranges and related ASNs on the organization page.
What country is AS17421 registered in?
AS17421 is registered in Taiwan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
