List of the top 20 organizations with the largest IP allocations in San Marino
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Telecom Italia San Marino S.p.A | 20,224 | 0 | 1 | 79 | |
| Passepartout s.p.a. | 15,872 | 0 | 1 | 17 | |
| Abavia S.r.l. | 3,328 | 218 | 1 | 10 | |
| 4 | Telenet S.r.l. | 3,072 | 0 | 1 | 2 |
| 5 | Bluindaco S.R.L. | 1,536 | 0 | 1 | 3 |
| 6 | S.P.A. Societa' Servizi Informatici Sammarinesi - S.S.I.S. | 1,024 | 0 | 1 | 1 |
| 7 | Semplify Srl | 1,024 | 0 | 1 | 4 |
| 8 | Underscore S.r.l. | 512 | 0 | 2 | 2 |
| 9 | AZIENDA AUTONOMA DI STATO PER I SERVIZI PUBBLICI | 256 | 0 | 1 | 1 |