Network · data from 2026-11-12
AS18596 Madison Communications, Inc.
Registry name: MADISONTELCO - Madison Telephone Company, US · PeeringDB
Announced routes
Every prefix a peer of the route collectors sees with origin AS18596, 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.
| 66.242.221.0/24 | No ROA | Nonecovered by 66.242.192.0/19 | 673 100% |
| 76.77.236.0/22 | No ROA | Nonecovered by 76.77.224.0/20 | 673 100% |
| 66.242.214.0/23 | No ROA | Nonecovered by 66.242.192.0/19 | 671 100% |
| 76.77.232.0/22 | No ROA | Nonecovered by 76.77.224.0/20 | 671 100% |
| 66.242.192.0/24 | No ROA | Nonecovered by 66.242.192.0/19 | 670 100% |
| 2605:1680::/32 | No ROA | None | 631 99% |
| 66.242.208.0/22 | No ROA | Nonecovered by 66.242.192.0/19 | 2 0%low visibility |
| 66.242.192.0/19 | No ROA | RIR databaseARIN | 671 100% |
| 76.77.224.0/20 | No ROA | RIR databaseARIN | 671 100% |
AS-SET
PeeringDB's irr_as_set for AS18596: AS18596. Expanded from the day's IRR dumps the way bgpq4 does against whois.radb.net: a name with a database is read from that database only, one without from the first database in RADB's order. "Not covered" = this network's own routes that a filter built from the set would leave out (AS18596 isn't in the set, or no route object for AS18596 covers the route; more-specifics of a route object are accepted down to /24 and /48, as with bgpq4 -A -R 24 / -R 48). Customers' routes aren't counted: the collectors show each route's origin, not which network it came through.
| Name | Database | ASNs | Sets | AS18596 in it | Not covered | |
|---|---|---|---|---|---|---|
| AS18596 | A single AS number, not a set: AS18596 (this network), 3 route objects. | |||||
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 17 are in fix.csv.
- ROA: none9
- Route object: none7
- Route object: not announced1
| Change | Prefix or set | Detail |
|---|---|---|
| ROA: none | 66.242.221.0/24 | No ROA covers it. Add a ROA for AS18596, maxLength 24. |
| Route object: none | 66.242.221.0/24 | No route object for it. A route object for 66.242.192.0/19 with origin AS18596 covers it (filters allowing more-specifics accept it). Add a route object with origin AS18596 in the RIR database for the space. |
| ROA: none | 76.77.236.0/22 | No ROA covers it. Add a ROA for AS18596, maxLength 22. |
| Route object: none | 76.77.236.0/22 | No route object for it. A route object for 76.77.224.0/20 with origin AS18596 covers it (filters allowing more-specifics accept it). Add a route object with origin AS18596 in the RIR database for the space. |
| ROA: none | 66.242.214.0/23 | No ROA covers it. Add a ROA for AS18596, maxLength 23. |
| Route object: none | 66.242.214.0/23 | No route object for it. A route object for 66.242.192.0/19 with origin AS18596 covers it (filters allowing more-specifics accept it). Add a route object with origin AS18596 in the RIR database for the space. |
| ROA: none | 76.77.232.0/22 | No ROA covers it. Add a ROA for AS18596, maxLength 22. |
| Route object: none | 76.77.232.0/22 | No route object for it. A route object for 76.77.224.0/20 with origin AS18596 covers it (filters allowing more-specifics accept it). Add a route object with origin AS18596 in the RIR database for the space. |
| ROA: none | 66.242.192.0/24 | No ROA covers it. Add a ROA for AS18596, maxLength 24. |
| Route object: none | 66.242.192.0/24 | No route object for it. A route object for 66.242.192.0/19 with origin AS18596 covers it (filters allowing more-specifics accept it). Add a route object with origin AS18596 in the RIR database for the space. |
| ROA: none | 2605:1680::/32 | No ROA covers it. Add a ROA for AS18596, maxLength 32. |
| Route object: none | 2605:1680::/32 | No route object for it. Add a route object with origin AS18596 in the RIR database for the space. |
| ROA: none | 66.242.208.0/22 | No ROA covers it. Add a ROA for AS18596, maxLength 22. |
| Route object: none | 66.242.208.0/22 | No route object for it. A route object for 66.242.192.0/19 with origin AS18596 covers it (filters allowing more-specifics accept it). Add a route object with origin AS18596 in the RIR database for the space. |
| ROA: none | 66.242.192.0/19 | No ROA covers it. Add a ROA for AS18596, maxLength 19. |
| ROA: none | 76.77.224.0/20 | No ROA covers it. Add a ROA for AS18596, maxLength 20. |
Route objects not announced
Route objects with origin AS18596 whose prefix no peer sees AS18596 announce. Many are kept on purpose (backup routes, space announced only in some places).
| 2001:470:375::/48 | ARIN | Valid |
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.