01210 area code: Birmingham numbers starting 0121 0
01210 is not a separate area code. It is Birmingham (0121) followed by local numbers starting 0.
70,000 numbers are allocated in 7 blocks to 6 listed holders (Ofcom, 14 Oct 2026).
Check a 01210 number privately
Number ranges registered under 0121 0
| Number range | Listed holder | Status | Allocation date |
|---|---|---|---|
| 0121 0000000 – 0121 0009999 | Flextel Limited | Allocated | 2005-03-22 |
| 0121 0010000 – 0121 0019999 | Dynamic Mobile Billing Limited | Allocated | 2006-01-13 |
| 0121 0030000 – 0121 0039999 | Virgin Media Limited | Allocated | 2000-06-15 |
| 0121 0050000 – 0121 0059999 | Vonage Business Limited | Allocated | 2012-10-09 |
| 0121 0070000 – 0121 0079999 | Syntec Limited | Allocated | 2013-11-20 |
| 0121 0100000 – 0121 0109999 | TalkTalk Communications Limited | Allocated | 2003-10-09 |
| 0121 0120000 – 0121 0129999 | Vonage Business Limited | Allocated | 2015-03-17 |
| 0121 0020000 – 0121 0029999 | Not listed | Quarantined | Not recorded |
| 0121 0040000 – 0121 0049999 | Not listed | Protected | Not recorded |
| 0121 0060000 – 0121 0069999 | Not listed | Protected | Not recorded |
| 0121 0080000 – 0121 0089999 | Not listed | Protected | Not recorded |
| 0121 0090000 – 0121 0099999 | Not listed | Protected | Not recorded |
| 0121 0110000 – 0121 0119999 | Not listed | Protected | Not recorded |
| 0121 0130000 – 0121 0139999 | Not listed | Protected | Not recorded |
| 0121 0140000 – 0121 0149999 | Not listed | Protected | Not recorded |
| 0121 0150000 – 0121 0159999 | Not listed | Protected | Not recorded |
| 0121 0160000 – 0121 0169999 | Not listed | Protected | Not recorded |
| 0121 0170000 – 0121 0179999 | Not listed | Protected | Not recorded |
| 0121 0180000 – 0121 0189999 | Not listed | Protected | Not recorded |
| 0121 0190000 – 0121 0199999 | Not listed | Protected | Not recorded |
| 0121 0200000 – 0121 0209999 | Not listed | Protected | Not recorded |
| 0121 0210000 – 0121 0219999 | Not listed | Protected | Not recorded |
| 0121 0220000 – 0121 0229999 | Not listed | Protected | Not recorded |
| 0121 0230000 – 0121 0239999 | Not listed | Protected | Not recorded |
| 0121 0240000 – 0121 0249999 | Not listed | Protected | Not recorded |
| 0121 0250000 – 0121 0259999 | Not listed | Protected | Not recorded |
| 0121 0260000 – 0121 0269999 | Not listed | Protected | Not recorded |
| 0121 0270000 – 0121 0279999 | Not listed | Protected | Not recorded |
| 0121 0280000 – 0121 0289999 | Not listed | Protected | Not recorded |
| 0121 0290000 – 0121 0299999 | Not listed | Protected | Not recorded |
| 0121 0300000 – 0121 0309999 | Not listed | Protected | Not recorded |
| 0121 0310000 – 0121 0319999 | Not listed | Protected | Not recorded |
| 0121 0320000 – 0121 0329999 | Not listed | Protected | Not recorded |
| 0121 0330000 – 0121 0339999 | Not listed | Protected | Not recorded |
| 0121 0340000 – 0121 0349999 | Not listed | Protected | Not recorded |
| 0121 0350000 – 0121 0359999 | Not listed | Protected | Not recorded |
| 0121 0360000 – 0121 0369999 | Not listed | Protected | Not recorded |
| 0121 0370000 – 0121 0379999 | Not listed | Protected | Not recorded |
| 0121 0380000 – 0121 0389999 | Not listed | Protected | Not recorded |
| 0121 0390000 – 0121 0399999 | Not listed | Protected | Not recorded |
| 0121 0400000 – 0121 0409999 | Not listed | Protected | Not recorded |
| 0121 0410000 – 0121 0419999 | Not listed | Protected | Not recorded |
| 0121 0420000 – 0121 0429999 | Not listed | Protected | Not recorded |
| 0121 0430000 – 0121 0439999 | Not listed | Protected | Not recorded |
| 0121 0440000 – 0121 0449999 | Not listed | Protected | Not recorded |
| 0121 0450000 – 0121 0459999 | Not listed | Protected | Not recorded |
| 0121 0460000 – 0121 0469999 | Not listed | Protected | Not recorded |
| 0121 0470000 – 0121 0479999 | Not listed | Protected | Not recorded |
| 0121 0480000 – 0121 0489999 | Not listed | Protected | Not recorded |
| 0121 0490000 – 0121 0499999 | Not listed | Protected | Not recorded |
| 0121 0500000 – 0121 0509999 | Not listed | Protected | Not recorded |
| 0121 0510000 – 0121 0519999 | Not listed | Protected | Not recorded |
| 0121 0520000 – 0121 0529999 | Not listed | Protected | Not recorded |
| 0121 0530000 – 0121 0539999 | Not listed | Protected | Not recorded |
| 0121 0540000 – 0121 0549999 | Not listed | Protected | Not recorded |
| 0121 0550000 – 0121 0559999 | Not listed | Protected | Not recorded |
| 0121 0560000 – 0121 0569999 | Not listed | Protected | Not recorded |
| 0121 0570000 – 0121 0579999 | Not listed | Protected | Not recorded |
| 0121 0580000 – 0121 0589999 | Not listed | Protected | Not recorded |
| 0121 0590000 – 0121 0599999 | Not listed | Protected | Not recorded |
| 0121 0600000 – 0121 0609999 | Not listed | Protected | Not recorded |
| 0121 0610000 – 0121 0619999 | Not listed | Protected | Not recorded |
| 0121 0620000 – 0121 0629999 | Not listed | Protected | Not recorded |
| 0121 0630000 – 0121 0639999 | Not listed | Protected | Not recorded |
| 0121 0640000 – 0121 0649999 | Not listed | Protected | Not recorded |
| 0121 0650000 – 0121 0659999 | Not listed | Protected | Not recorded |
| 0121 0660000 – 0121 0669999 | Not listed | Protected | Not recorded |
| 0121 0670000 – 0121 0679999 | Not listed | Protected | Not recorded |
| 0121 0680000 – 0121 0689999 | Not listed | Protected | Not recorded |
| 0121 0690000 – 0121 0699999 | Not listed | Protected | Not recorded |
| 0121 0700000 – 0121 0709999 | Not listed | Protected | Not recorded |
| 0121 0710000 – 0121 0719999 | Not listed | Protected | Not recorded |
| 0121 0720000 – 0121 0729999 | Not listed | Protected | Not recorded |
| 0121 0730000 – 0121 0739999 | Not listed | Protected | Not recorded |
| 0121 0740000 – 0121 0749999 | Not listed | Protected | Not recorded |
| 0121 0750000 – 0121 0759999 | Not listed | Protected | Not recorded |
| 0121 0760000 – 0121 0769999 | Not listed | Protected | Not recorded |
| 0121 0770000 – 0121 0779999 | Not listed | Protected | Not recorded |
| 0121 0780000 – 0121 0789999 | Not listed | Protected | Not recorded |
| 0121 0790000 – 0121 0799999 | Not listed | Protected | Not recorded |
| 0121 0800000 – 0121 0809999 | Not listed | Protected | Not recorded |
| 0121 0810000 – 0121 0819999 | Not listed | Protected | Not recorded |
| 0121 0820000 – 0121 0829999 | Not listed | Protected | Not recorded |
| 0121 0830000 – 0121 0839999 | Not listed | Protected | Not recorded |
| 0121 0840000 – 0121 0849999 | Not listed | Protected | Not recorded |
| 0121 0850000 – 0121 0859999 | Not listed | Protected | Not recorded |
| 0121 0860000 – 0121 0869999 | Not listed | Protected | Not recorded |
| 0121 0870000 – 0121 0879999 | Not listed | Protected | Not recorded |
| 0121 0880000 – 0121 0889999 | Not listed | Protected | Not recorded |
| 0121 0890000 – 0121 0899999 | Not listed | Protected | Not recorded |
| 0121 0900000 – 0121 0909999 | Not listed | Protected | Not recorded |
| 0121 0910000 – 0121 0919999 | Not listed | Protected | Not recorded |
| 0121 0920000 – 0121 0929999 | Not listed | Protected | Not recorded |
| 0121 0930000 – 0121 0939999 | Not listed | Protected | Not recorded |
| 0121 0940000 – 0121 0949999 | Not listed | Protected | Not recorded |
| 0121 0950000 – 0121 0959999 | Not listed | Protected | Not recorded |
| 0121 0960000 – 0121 0969999 | Not listed | Protected | Not recorded |
| 0121 0970000 – 0121 0979999 | Not listed | Protected | Not recorded |
| 0121 0980000 – 0121 0989999 | Not listed | Protected | Not recorded |
| 0121 0990000 – 0121 0999999 | Not listed | Protected | Not recorded |
01210 allocation
Blocks whose local number starts with 0 under Birmingham (0121): 70,000 allocated numbers in 7 blocks.
- Allocated
- 70,000 numbers · 7 blocks
- Quarantined
- 10,000 numbers · 1 block
- Protected
- 920,000 numbers · 92 blocks
Holders of 0121 0 numbers
Vonage Business Limited holds 28.5% of the allocated numbers (20,000 numbers, 2 blocks).
| Holder | Share | Numbers | Blocks | Earliest allocation |
|---|---|---|---|---|
| Vonage Business Limited | 28.5% | 20,000 | 2 | 2012-10-09 |
| Dynamic Mobile Billing Limited | 14.3% | 10,000 | 1 | 2006-01-13 |
| Flextel Limited | 14.3% | 10,000 | 1 | 2005-03-22 |
| Syntec Limited | 14.3% | 10,000 | 1 | 2013-11-20 |
| TalkTalk Communications Limited | 14.3% | 10,000 | 1 | 2003-10-09 |
| Virgin Media Limited | 14.3% | 10,000 | 1 | 2000-06-15 |
Weekly changes for 01210
0 block changes from 19 Aug 2026 to 17 Oct 2026. Each week counts a block once.
| From | To | Changed blocks |
|---|---|---|
| 2026-08-19 | 2026-08-26 | 0 |
| 2026-08-26 | 2026-09-02 | 0 |
| 2026-09-02 | 2026-09-09 | 0 |
| 2026-09-09 | 2026-09-16 | 0 |
| 2026-09-16 | 2026-09-24 | 0 |
| 2026-09-24 | 2026-09-30 | 0 |
| 2026-09-30 | 2026-10-07 | 0 |
| 2026-10-07 | 2026-10-17 | 0 |
These numbers belong to 0121 Birmingham. Methodology.
01210 source: Ofcom s1.csv, published 14 Oct 2026. Download 0121 0 blocks (CSV). Contains Ofcom copyright material.
Source detail · 01210
| Claim | Value | Identifier |
|---|---|---|
| allocated_numbers | 70000 | subcode:0121-0:allocated_numbers:fc227d9e:v1 |
| allocated_records | 7 | subcode:0121-0:allocated_records:fc227d9e:v1 |
| listed_holders | 6 | subcode:0121-0:listed_holders:fc227d9e:v1 |
| area_code | 0121 | subcode:0121-0:area_code:fc227d9e:v1 |
| first_digit | 0 | subcode:0121-0:first_digit:fc227d9e:v1 |
| snapshot_date | 14 Oct 2026 | subcode:0121-0:snapshot_date:fc227d9e:v1 |