Network · data from 2026-11-12
AS21520 AS21520 - Instituto Tecnologico Autonomo de Mexico(ITAM)
Registry name: AS21520 - Instituto Tecnologico Autonomo de Mexico(ITAM), MX · not in PeeringDB
23IPv4 routes
0.0% RPKI valid · 73.9% with a route object
0IPv6 routes
0RPKI invalid
0 origin · 0 maxLength
23No ROA
6 with no route object for this origin
2Low visibility
seen by under 10% of full-table peers
9Route objects not announced
registered with origin AS21520, seen from no peer
Announced routes
Every prefix a peer of the route collectors sees with origin AS21520, things to look at first. Visibility = full-table peers that see it, of 673 (IPv4) and 636 (IPv6) on 75 collectors. Also as routes.csv.
| 148.205.195.0/24 | No ROA | Nonecovered by 148.205.0.0/16 | 673 100% |
| 148.205.13.0/24 | No ROA | Other origin onlycovered by 148.205.0.0/16 | 672 100% |
| 148.205.56.0/21 | No ROA | Other origin onlycovered by 148.205.0.0/16 | 672 100% |
| 148.205.90.0/24 | No ROA | Other origin onlycovered by 148.205.0.0/16 | 672 100% |
| 148.205.104.0/21 | No ROA | Other origin onlycovered by 148.205.0.0/16 | 672 100% |
| 148.205.89.0/24 | No ROA | Other origin onlycovered by 148.205.0.0/16 | 666 99% |
| 148.205.40.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.48.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.64.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.68.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.72.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.112.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.120.0/24 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.132.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.136.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.164.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.176.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.193.0/24 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.196.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.236.0/22 | No ROA | Other IRR onlyRADB | 672 100% |
| 148.205.228.0/22 | No ROA | Other IRR onlyRADB | 670 100% |
| 148.205.36.0/22 | No ROA | Other IRR onlyRADB | 2 0%low visibility |
| 148.205.148.0/22 | No ROA | Other IRR onlyRADB | 2 0%low visibility |
AS-SET
AS21520 isn't in PeeringDB, where networks name their AS-SET.
Fix list
The changes that would bring RPKI, the IRR and what's announced into line. Some are deliberate (a route object kept for a backup route, say); the network decides. All 55 are in fix.csv.
- ROA: none23
- Route object: none6
- Route object: RIR17
- Route object: not announced9
| Change | Prefix or set | Detail |
|---|---|---|
| ROA: none | 148.205.195.0/24 | No ROA covers it. Add a ROA for AS21520, maxLength 24. |
| Route object: none | 148.205.195.0/24 | No route object for it. A route object for 148.205.0.0/16 with origin AS21520 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21520 in the RIR database for the space. |
| ROA: none | 148.205.13.0/24 | No ROA covers it. Add a ROA for AS21520, maxLength 24. |
| Route object: none | 148.205.13.0/24 | Route objects for it name AS17072. A route object for 148.205.0.0/16 with origin AS21520 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21520 in the RIR database for the space. |
| ROA: none | 148.205.56.0/21 | No ROA covers it. Add a ROA for AS21520, maxLength 21. |
| Route object: none | 148.205.56.0/21 | Route objects for it name AS17072. A route object for 148.205.0.0/16 with origin AS21520 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21520 in the RIR database for the space. |
| ROA: none | 148.205.90.0/24 | No ROA covers it. Add a ROA for AS21520, maxLength 24. |
| Route object: none | 148.205.90.0/24 | Route objects for it name AS17072. A route object for 148.205.0.0/16 with origin AS21520 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21520 in the RIR database for the space. |
| ROA: none | 148.205.104.0/21 | No ROA covers it. Add a ROA for AS21520, maxLength 21. |
| Route object: none | 148.205.104.0/21 | Route objects for it name AS17072. A route object for 148.205.0.0/16 with origin AS21520 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21520 in the RIR database for the space. |
| ROA: none | 148.205.89.0/24 | No ROA covers it. Add a ROA for AS21520, maxLength 24. |
| Route object: none | 148.205.89.0/24 | Route objects for it name AS17072. A route object for 148.205.0.0/16 with origin AS21520 covers it (filters allowing more-specifics accept it). Add a route object with origin AS21520 in the RIR database for the space. |
| ROA: none | 148.205.40.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.40.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.48.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.48.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.64.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.64.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.68.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.68.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.72.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.72.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.112.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.112.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.120.0/24 | No ROA covers it. Add a ROA for AS21520, maxLength 24. |
| Route object: RIR | 148.205.120.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.132.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.132.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.136.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.136.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.164.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.164.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.176.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.176.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.193.0/24 | No ROA covers it. Add a ROA for AS21520, maxLength 24. |
| Route object: RIR | 148.205.193.0/24 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.196.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.196.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.236.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.236.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.228.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.228.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.36.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.36.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
| ROA: none | 148.205.148.0/22 | No ROA covers it. Add a ROA for AS21520, maxLength 22. |
| Route object: RIR | 148.205.148.0/22 | Route object only in RADB. Add it in the RIR database for the space. |
Route objects not announced
Route objects with origin AS21520 whose prefix no peer sees AS21520 announce. Many are kept on purpose (backup routes, space announced only in some places).
| 148.205.0.0/16 | RADB | No ROA |
| 148.205.84.0/24 | RADB | No ROA |
| 148.205.104.0/22 | RADB | No ROA |
| 148.205.124.0/22 | RADB | No ROA |
| 148.205.152.0/22 | RADB | No ROA |
| 148.205.191.0/24 | RADB | No ROA |
| 148.205.208.0/22 | RADB | No ROA |
| 148.205.208.0/24 | RADB | No ROA |
| 148.205.232.0/22 | RADB | No ROA |
Routes: the 08:00 UTC snapshots of 2026-11-12 from 75 RIPE RIS and RouteViews collectors. RPKI: our rpki-client run before the snapshot. IRR: the day's dumps of the five RIR databases and RADB's mirrors. The LEVEL3 and IDNIC databases publish no dump and aren't read, so route objects only there count as none.