This page contains information about which telephone companies the various 03450 numbers are allocated to.
| First Digits | Status | Communications Provider | Change |
|---|---|---|---|
| 0345 000 | Allocated | Level 3 Communications UK Limited | 04/2007 |
| 0345 001 | Allocated | Level 3 Communications UK Limited | 04/2007 |
| 0345 002 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 003 | Allocated | Edge Telecom Limited | 09/2007 |
| 0345 004 | Allocated | Magrathea Telecommunications Limited | 11/2007 |
| 0345 005 | Protected | - | - |
| 0345 006 | Allocated | InTechnology Plc | 06/2007 |
| 0345 007 | Protected | - | - |
| 0345 008 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 009 | Allocated | Vodafone Ltd (Thus) | 01/2012 |
| 0345 010 | Allocated | Level 3 Communications UK Limited | 04/2007 |
| 0345 011 | Allocated | Vodafone Ltd (C&W) | 05/2009 |
| 0345 012 | Allocated | Edge Telecom Limited | 09/2007 |
| 0345 013 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 014 | Allocated | Vodafone Ltd (C&W) | 05/2009 |
| 0345 015 | Allocated | Level 3 Communications UK Limited | 04/2007 |
| 0345 016 | Protected | - | - |
| 0345 017 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 018 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 019 | Allocated | Level 3 Communications UK Limited | 04/2007 |
| 0345 020 | Allocated | Invomo Ltd | 10/2007 |
| 0345 021 | Allocated | Alphatalk Ltd | 03/2009 |
| 0345 022 | Protected | - | - |
| 0345 023 | Protected | - | - |
| 0345 024 | Protected | - | - |
| 0345 025 | Allocated | Wavecrest (UK) Ltd | 07/2007 |
| 0345 026 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 027 | Protected | - | - |
| 0345 028 | Allocated | Affiniti Integrated Solutions Ltd | 07/2013 |
| 0345 029 | Protected | - | - |
| 0345 030 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 031 | Allocated | Telecom2 Ltd | 10/2009 |
| 0345 032 | Allocated | 24 Seven Communications Ltd | 10/2011 |
| 0345 033 | Protected | - | - |
| 0345 034 | Allocated | Gamma Telecom Holdings Ltd | 02/2008 |
| 0345 035 | Protected | - | - |
| 0345 036 | Withdrawn | - | - |
| 0345 037 | Protected | - | - |
| 0345 038 | Protected | - | - |
| 0345 039 | Allocated | Level 3 Communications UK Limited | 04/2007 |
| 0345 040 | Allocated | Call Stream Limited | 05/2013 |
| 0345 041 | Protected | - | - |
| 0345 042 | Protected | - | - |
| 0345 043 | Protected | - | - |
| 0345 044 | Protected | - | - |
| 0345 045 | Allocated | Virgin Media Limited | 10/2007 |
| 0345 046 | Protected | - | - |
| 0345 047 | Protected | - | - |
| 0345 048 | Protected | - | - |
| 0345 049 | Protected | - | - |
| 0345 050 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 051 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 052 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 053 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 054 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 055 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 056 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 057 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 058 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 059 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 060 | Allocated | Talk Numbers Ltd | 06/2010 |
| 0345 061 | Allocated | Talk Numbers Ltd | 06/2010 |
| 0345 062 | Allocated | Talk Numbers Ltd | 06/2010 |
| 0345 063 | Allocated | Talk Numbers Ltd | 06/2010 |
| 0345 064 | Allocated | Talk Numbers Ltd | 06/2010 |
| 0345 065 | Allocated | Talk Numbers Ltd | 06/2010 |
| 0345 066 | Allocated | Budget Numbers Ltd | 06/2010 |
| 0345 067 | Allocated | Budget Numbers Ltd | 06/2010 |
| 0345 068 | Allocated | Budget Numbers Ltd | 06/2010 |
| 0345 069 | Allocated | Budget Numbers Ltd | 06/2010 |
| 0345 070 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 071 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 072 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 073 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 074 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 075 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 076 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 077 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 078 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 079 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 080 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 081 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 082 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 083 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 084 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 085 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 086 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 087 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 088 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 089 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 090 | Allocated | Orange Business Holdings UK Limited | 02/2008 |
| 0345 091 | Protected | - | - |
| 0345 092 | Allocated | Syntec Limited | 06/2007 |
| 0345 093 | Protected | - | - |
| 0345 094 | Allocated | Nexus Telecommunications Limited | 07/2007 |
| 0345 095 | Allocated | Numbergroup Network Ltd | 11/2007 |
| 0345 096 | Protected | - | - |
| 0345 097 | Protected | - | - |
| 0345 098 | Allocated | Mintaka Limited | 06/2014 |
| 0345 099 | Allocated | TalkTalk Communications Limited | 07/2008 |