This page contains information about which telephone companies the various 03330 numbers are allocated to.
| First Digits | Status | Communications Provider | Change |
|---|---|---|---|
| 0333 000 | Allocated | Virgin Media Limited | 03/2007 |
| 0333 001 | Allocated | TalkTalk Communications Limited | 02/2009 |
| 0333 002 | Allocated | Lanonyx Telecom Limited | 08/2011 |
| 0333 003 | Allocated | TalkTalk Communications Limited | 05/2009 |
| 0333 004 | Allocated | Gamma Telecom Holdings Ltd | 07/2013 |
| 0333 005 | Allocated | TalkTalk Communications Limited | 01/2014 |
| 0333 006 | Allocated | Gamma Telecom Holdings Ltd | 07/2013 |
| 0333 007 | Allocated | Diamond Communications Ltd | 11/2011 |
| 0333 008 | Allocated | TelecomEight Network Ltd | 03/2013 |
| 0333 009 | Free | - | - |
| 0333 010 | Allocated | InTechnology Plc | 08/2007 |
| 0333 011 | Allocated | Gamma Telecom Holdings Ltd | 02/2013 |
| 0333 012 | Allocated | Vodafone Ltd (C&W) | 11/2010 |
| 0333 013 | Allocated | Gamma Telecom Holdings Ltd | 02/2013 |
| 0333 014 | Allocated | Gamma Telecom Holdings Ltd | 07/2013 |
| 0333 015 | Free | - | - |
| 0333 016 | Free | - | - |
| 0333 017 | Free | - | - |
| 0333 018 | Free | - | - |
| 0333 019 | Free | - | - |
| 0333 020 | Allocated | AVCOne Ltd | 10/2012 |
| 0333 021 | Free | - | - |
| 0333 022 | Allocated | Digital Mail Limited | 04/2008 |
| 0333 023 | Allocated | VOIP4U | 08/2014 |
| 0333 024 | Free | - | - |
| 0333 025 | Free | - | - |
| 0333 026 | Free | - | - |
| 0333 027 | Free | - | - |
| 0333 028 | Free | - | - |
| 0333 029 | Free | - | - |
| 0333 030 | Allocated | Telecom2 Ltd | 08/2009 |
| 0333 031 | Free | - | - |
| 0333 032 | Free | - | - |
| 0333 033 | Allocated | Nextec (UK) Limited | 04/2007 |
| 0333 034 | Free | - | - |
| 0333 035 | Free | - | - |
| 0333 036 | Free | - | - |
| 0333 037 | Free | - | - |
| 0333 038 | Free | - | - |
| 0333 039 | Free | - | - |
| 0333 040 | Allocated | Virtual Talk Ltd | 04/2014 |
| 0333 041 | Free | - | - |
| 0333 042 | Free | - | - |
| 0333 043 | Free | - | - |
| 0333 044 | Allocated | Barritel Limited | 03/2007 |
| 0333 045 | Free | - | - |
| 0333 046 | Free | - | - |
| 0333 047 | Free | - | - |
| 0333 048 | Free | - | - |
| 0333 049 | Free | - | - |
| 0333 050 | Free | - | - |
| 0333 051 | Free | - | - |
| 0333 052 | Free | - | - |
| 0333 053 | Free | - | - |
| 0333 054 | Free | - | - |
| 0333 055 | Allocated | Barritel Limited | 03/2007 |
| 0333 056 | Free | - | - |
| 0333 057 | Free | - | - |
| 0333 058 | Free | - | - |
| 0333 059 | Free | - | - |
| 0333 060 | Free | - | - |
| 0333 061 | Free | - | - |
| 0333 062 | Free | - | - |
| 0333 063 | Free | - | - |
| 0333 064 | Free | - | - |
| 0333 065 | Free | - | - |
| 0333 066 | Allocated | Premier Voicemail Ltd | 04/2007 |
| 0333 067 | Free | - | - |
| 0333 068 | Free | - | - |
| 0333 069 | Free | - | - |
| 0333 070 | Free | - | - |
| 0333 071 | Free | - | - |
| 0333 072 | Free | - | - |
| 0333 073 | Free | - | - |
| 0333 074 | Free | - | - |
| 0333 075 | Free | - | - |
| 0333 076 | Free | - | - |
| 0333 077 | Allocated | alwaysON Ltd | 03/2009 |
| 0333 078 | Free | - | - |
| 0333 079 | Free | - | - |
| 0333 080 | Allocated | XoverX Ltd | 05/2013 |
| 0333 081 | Free | - | - |
| 0333 082 | Free | - | - |
| 0333 083 | Free | - | - |
| 0333 084 | Free | - | - |
| 0333 085 | Free | - | - |
| 0333 086 | Free | - | - |
| 0333 087 | Free | - | - |
| 0333 088 | Allocated | Barritec Limited | 03/2007 |
| 0333 089 | Free | - | - |
| 0333 090 | Free | - | - |
| 0333 091 | Free | - | - |
| 0333 092 | Free | - | - |
| 0333 093 | Free | - | - |
| 0333 094 | Free | - | - |
| 0333 095 | Free | - | - |
| 0333 096 | Free | - | - |
| 0333 097 | Free | - | - |
| 0333 098 | Free | - | - |
| 0333 099 | Allocated | 10ACT Limited | 01/2010 |