AS21520
Instituto Tecnologico Autonomo de Mexico(ITAM)
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
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS21520 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 |
|---|---|---|
| 148.205.89.0/24 | 80,475 | 2026-09-18 01:30:13 |
| 148.205.112.0/22 | 58,841 | 2026-09-18 01:12:59 |
| 148.205.13.0/24 | 58,669 | 2026-09-18 01:12:59 |
| 148.205.195.0/24 | 47,754 | 2026-09-18 01:47:11 |
| 148.205.176.0/22 | 44,180 | 2026-09-18 01:12:59 |
| 148.205.48.0/22 | 44,179 | 2026-09-18 01:12:59 |
| 148.205.72.0/22 | 44,160 | 2026-09-18 01:12:59 |
| 148.205.236.0/22 | 44,146 | 2026-09-18 01:12:59 |
| 148.205.64.0/22 | 44,141 | 2026-09-18 01:12:59 |
| 148.205.40.0/22 | 44,120 | 2026-09-18 01:12:59 |
| 148.205.90.0/24 | 44,057 | 2026-09-18 01:12:59 |
| 148.205.104.0/21 | 40,613 | 2026-09-18 01:12:59 |
| 148.205.68.0/22 | 40,605 | 2026-09-18 01:12:59 |
| 148.205.148.0/22 | 40,598 | 2026-09-18 01:12:59 |
| 148.205.136.0/22 | 40,593 | 2026-09-18 01:12:59 |
| 148.205.36.0/22 | 40,587 | 2026-09-18 01:12:59 |
| 148.205.120.0/24 | 40,581 | 2026-09-18 01:12:59 |
| 148.205.196.0/22 | 40,577 | 2026-09-18 01:12:59 |
| 148.205.56.0/21 | 40,574 | 2026-09-18 01:12:59 |
| 148.205.132.0/22 | 40,539 | 2026-09-18 01:12:59 |
| 148.205.228.0/22 | 40,531 | 2026-09-18 01:12:59 |
| 148.205.164.0/22 | 40,524 | 2026-09-18 01:12:59 |
| 148.205.193.0/24 | 27,588 | 2026-09-18 01:13:06 |
| 176.102.189.0/24 | 76 | 2026-08-25 21:11:48 |
Frequently Asked Questions
What is AS21520?
AS21520 is an Autonomous System Number assigned to Instituto Tecnologico Autonomo de Mexico(ITAM). 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 AS21520 announce?
AS21520 announces 21.0K IPv4 addresses distributed across 22 routed CIDR prefixes. The network is registered in Mexico.
Who operates AS21520?
AS21520 is operated by Instituto Tecnologico Autonomo de Mexico(ITAM). The organization is based in Mexico. You can view all IP ranges and related ASNs on the organization page.
What country is AS21520 registered in?
AS21520 is registered in Mexico. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
