I dag er det to faste forvalg å velge mellom. Det ene gjelder all innenlandstrafikk, og det andre gjelder for trafikk til utlandet.
Fast forvalg kommer som en del av et EU/EØS-direktiv, og er ansett å ha betydning for konkurransesituasjonen i markedet, spesielt i privatmarkedet.
EUs samtrafikkdirektiv (97/33/EF) er endret gjennom Europaparlamentets og Rådets direktiv 98/61/EF av 24. september 1998 om endring av direktiv 97/33/EF med hensyn til nummerportabilitet og fast forvalg. Direktivteksten vedrørende fast forvalg lyder som følger:
"National regulatory authorities shall require at least organisations operating public telecommunications networks as set out in Part 1 of Annex I and notified by national regulatory authorities as organisations having significant market power, to enable their subscribers, including those using ISDN, to access the switched services of any interconnected provider of publicly available telecommunications services. For this purpose facilities shall be in place by 1 January 2000 at the latest or, in those countries which have been granted an additional transition period, as soon as possible thereafter, but no later than two years after any later date agreed for full liberalisation of voice telephony services, which allow the subscriber to choose these services by means of pre-selection with a facility to override any pre-selected choice on a call-by-call basis by dialling a short prefix. National regulatory authorities shall ensure that pricing for interconnection related to the provision of this facility is cost-orientated and that direct charges to consumers, if any, do not act as a disincentive for the use of this facility."
De norske prefiksene per 16. mai 2001, er:
- 1500; Spray Network AS
- 1501; Global One Communications AS
- 1502; Tele2 Norge AS
- 1503; UPC Norge AS
- 1504; Tele1 Europe AS
- 1505; ElTele AS
- 1506; Tele Pluss Access AS
- 1507; RingNett AS
- 1508; FaciliCom International AS
- 1509; Carrot Communications AS
- 1510; MCI WorldCom AS
- 1511; Catch Communications AS (tidligere EDB Consult AS)
- 1512; Tele1 AS
- 1513; Chess Communication AS
- 1514; Site Communications AS
- 1515; NetCom GSM AS
- 1516; Enitel drift AS
- 1517; AUCS Communications Services (Sverige) AB
- 1518; Bredbåndsfabrikken AS
- 1519; Abonnera i Sverige AB
- 1520; NetCom GSM AS
- 1521; Carrier1 AG
- 1522; Global Telesystems Group Norge AS
- 1524; NETnet International AB
- 1525; Gratistelefonen AS
- 1526; Jippii Internet Services AS
- 1530; World Online AS
- 1531; Telenor Nett AS
- 1532; Telenor Mobil AS
- 1533; Telenor Nextel AS
- 1535; CyberCity Internet
- 1540; PowerTech Information Systems AS
- 1542; ACN Norge AS
- 1543; Bergen Nett og Media AS
- 1544; Sense Communications AS
- 1545; RSLCOM Sweden AB
- 1548; Utfors AS
