01135 area code: Leeds numbers starting 0113 5
01135 is not a separate area code. It is Leeds (0113) followed by local numbers starting 5.
380,000 numbers are allocated in 38 blocks to 23 listed holders (Ofcom, 14 Oct 2026).
Check a 01135 number privately
Number ranges registered under 0113 5
| Number range | Listed holder | Status | Allocation date |
|---|---|---|---|
| 0113 5110000 – 0113 5119999 | Magrathea Telecommunications Limited | Allocated | 2019-09-09 |
| 0113 5120000 – 0113 5129999 | Gamma Telecom Holdings Limited | Allocated | 2019-04-11 |
| 0113 5130000 – 0113 5139999 | BT | Allocated | 2020-01-07 |
| 0113 5140000 – 0113 5149999 | Odigo | Allocated | 2020-03-16 |
| 0113 5170000 – 0113 5179999 | Gamma Telecom Holdings Limited | Allocated | 2021-09-22 |
| 0113 5180000 – 0113 5189999 | Gamma Telecom Holdings Limited | Allocated | 2020-08-19 |
| 0113 5190000 – 0113 5199999 | Twilio Ireland Limited | Allocated | 2020-09-29 |
| 0113 5210000 – 0113 5219999 | Gamma Telecom Holdings Limited | Allocated | 2021-02-08 |
| 0113 5220000 – 0113 5229999 | TELNYX UK LIMITED | Allocated | 2020-04-28 |
| 0113 5240000 – 0113 5249999 | Colt Technology Services | Allocated | 2020-11-20 |
| 0113 5250000 – 0113 5259999 | PEERLESS NETWORK UK LIMITED | Allocated | 2019-09-05 |
| 0113 5260000 – 0113 5269999 | Colt Technology Services | Allocated | 2021-11-01 |
| 0113 5270000 – 0113 5279999 | Onvoy Communications Ltd. | Allocated | 2022-04-08 |
| 0113 5290000 – 0113 5299999 | BT | Allocated | 2023-04-03 |
| 0113 5300000 – 0113 5309999 | Callitech Limited | Allocated | 2017-09-20 |
| 0113 5310000 – 0113 5319999 | BT | Allocated | 2018-07-04 |
| 0113 5320000 – 0113 5329999 | Gamma Telecom Holdings Limited | Allocated | 2018-07-18 |
| 0113 5330000 – 0113 5339999 | Antheus Telecom Limited | Allocated | 2017-08-23 |
| 0113 5340000 – 0113 5349999 | IP Voice Networks Ltd | Allocated | 2017-09-20 |
| 0113 5350000 – 0113 5359999 | Virgin Media Limited | Allocated | 2018-01-31 |
| 0113 5360000 – 0113 5369999 | TalkTalk Communications Limited | Allocated | 2018-07-31 |
| 0113 5370000 – 0113 5379999 | Infinity Tracking Ltd | Allocated | 2018-11-20 |
| 0113 5380000 – 0113 5389999 | Belgacom International Carrier Services SA | Allocated | 2021-06-09 |
| 0113 5390000 – 0113 5399999 | Colt Technology Services | Allocated | 2019-02-12 |
| 0113 5400000 – 0113 5409999 | SiPalto Ltd | Allocated | 2019-11-05 |
| 0113 5410000 – 0113 5419999 | Colt Technology Services | Allocated | 2023-09-04 |
| 0113 5420000 – 0113 5429999 | KCOM Group Ltd | Allocated | 2022-09-08 |
| 0113 5430000 – 0113 5439999 | Colt Technology Services | Allocated | 2020-04-14 |
| 0113 5440000 – 0113 5449999 | EG TECHNOLOGIES LIMITED | Allocated | 2020-01-21 |
| 0113 5450000 – 0113 5459999 | ICUK Computing Services Limited | Allocated | 2019-08-12 |
| 0113 5460000 – 0113 5469999 | SONA BUSINESS PVT. LTD. | Allocated | 2023-03-27 |
| 0113 5470000 – 0113 5479999 | Gamma Telecom Holdings Limited | Allocated | 2025-03-17 |
| 0113 5480000 – 0113 5489999 | BT | Allocated | 2025-02-03 |
| 0113 5490000 – 0113 5499999 | 24 Seven Communications Limited | Allocated | 2021-07-19 |
| 0113 5500000 – 0113 5509999 | Colt Technology Services | Allocated | 2025-12-02 |
| 0113 5510000 – 0113 5519999 | BT | Allocated | 2025-12-04 |
| 0113 5520000 – 0113 5529999 | Gamma Telecom Holdings Limited | Allocated | 2026-02-25 |
| 0113 5550000 – 0113 5559999 | Tuxtel Ltd | Allocated | 2026-01-20 |
| 0113 5000000 – 0113 5009999 | Not listed | Protected | Not recorded |
| 0113 5010000 – 0113 5019999 | Not listed | Protected | Not recorded |
| 0113 5020000 – 0113 5029999 | Not listed | Protected | Not recorded |
| 0113 5030000 – 0113 5039999 | Not listed | Protected | Not recorded |
| 0113 5040000 – 0113 5049999 | Not listed | Protected | Not recorded |
| 0113 5050000 – 0113 5059999 | Not listed | Protected | Not recorded |
| 0113 5060000 – 0113 5069999 | Not listed | Protected | Not recorded |
| 0113 5070000 – 0113 5079999 | Not listed | Protected | Not recorded |
| 0113 5080000 – 0113 5089999 | Not listed | Protected | Not recorded |
| 0113 5090000 – 0113 5099999 | Not listed | Protected | Not recorded |
| 0113 5100000 – 0113 5109999 | Not listed | Protected | Not recorded |
| 0113 5150000 – 0113 5159999 | Not listed | Protected | Not recorded |
| 0113 5160000 – 0113 5169999 | Not listed | Protected | Not recorded |
| 0113 5200000 – 0113 5209999 | Not listed | Protected | Not recorded |
| 0113 5230000 – 0113 5239999 | Not listed | Protected | Not recorded |
| 0113 5280000 – 0113 5289999 | Not listed | Protected | Not recorded |
| 0113 5530000 – 0113 5539999 | Not listed | Free | Not recorded |
| 0113 5540000 – 0113 5549999 | Not listed | Free | Not recorded |
| 0113 5560000 – 0113 5569999 | Not listed | Free | Not recorded |
| 0113 5570000 – 0113 5579999 | Not listed | Free | Not recorded |
| 0113 5580000 – 0113 5589999 | Not listed | Protected | Not recorded |
| 0113 5590000 – 0113 5599999 | Not listed | Protected | Not recorded |
| 0113 5600000 – 0113 5609999 | Not listed | Protected | Not recorded |
| 0113 5610000 – 0113 5619999 | Not listed | Protected | Not recorded |
| 0113 5620000 – 0113 5629999 | Not listed | Protected | Not recorded |
| 0113 5630000 – 0113 5639999 | Not listed | Protected | Not recorded |
| 0113 5640000 – 0113 5649999 | Not listed | Protected | Not recorded |
| 0113 5650000 – 0113 5659999 | Not listed | Protected | Not recorded |
| 0113 5660000 – 0113 5669999 | Not listed | Protected | Not recorded |
| 0113 5670000 – 0113 5679999 | Not listed | Protected | Not recorded |
| 0113 5680000 – 0113 5689999 | Not listed | Protected | Not recorded |
| 0113 5690000 – 0113 5699999 | Not listed | Protected | Not recorded |
| 0113 5700000 – 0113 5709999 | Not listed | Protected | Not recorded |
| 0113 5710000 – 0113 5719999 | Not listed | Protected | Not recorded |
| 0113 5720000 – 0113 5729999 | Not listed | Protected | Not recorded |
| 0113 5730000 – 0113 5739999 | Not listed | Protected | Not recorded |
| 0113 5740000 – 0113 5749999 | Not listed | Protected | Not recorded |
| 0113 5750000 – 0113 5759999 | Not listed | Protected | Not recorded |
| 0113 5760000 – 0113 5769999 | Not listed | Protected | Not recorded |
| 0113 5770000 – 0113 5779999 | Not listed | Protected | Not recorded |
| 0113 5780000 – 0113 5789999 | Not listed | Protected | Not recorded |
| 0113 5790000 – 0113 5799999 | Not listed | Protected | Not recorded |
| 0113 5800000 – 0113 5809999 | Not listed | Protected | Not recorded |
| 0113 5810000 – 0113 5819999 | Not listed | Protected | Not recorded |
| 0113 5820000 – 0113 5829999 | Not listed | Protected | Not recorded |
| 0113 5830000 – 0113 5839999 | Not listed | Protected | Not recorded |
| 0113 5840000 – 0113 5849999 | Not listed | Protected | Not recorded |
| 0113 5850000 – 0113 5859999 | Not listed | Protected | Not recorded |
| 0113 5860000 – 0113 5869999 | Not listed | Protected | Not recorded |
| 0113 5870000 – 0113 5879999 | Not listed | Protected | Not recorded |
| 0113 5880000 – 0113 5889999 | Not listed | Protected | Not recorded |
| 0113 5890000 – 0113 5899999 | Not listed | Protected | Not recorded |
| 0113 5900000 – 0113 5909999 | Not listed | Protected | Not recorded |
| 0113 5910000 – 0113 5919999 | Not listed | Protected | Not recorded |
| 0113 5920000 – 0113 5929999 | Not listed | Protected | Not recorded |
| 0113 5930000 – 0113 5939999 | Not listed | Protected | Not recorded |
| 0113 5940000 – 0113 5949999 | Not listed | Protected | Not recorded |
| 0113 5950000 – 0113 5959999 | Not listed | Protected | Not recorded |
| 0113 5960000 – 0113 5969999 | Not listed | Protected | Not recorded |
| 0113 5970000 – 0113 5979999 | Not listed | Protected | Not recorded |
| 0113 5980000 – 0113 5989999 | Not listed | Protected | Not recorded |
| 0113 5990000 – 0113 5999999 | Not listed | Protected | Not recorded |
01135 allocation
Blocks whose local number starts with 5 under Leeds (0113): 380,000 allocated numbers in 38 blocks.
- Protected
- 580,000 numbers · 58 blocks
- Allocated
- 380,000 numbers · 38 blocks
- Free
- 40,000 numbers · 4 blocks
Holders of 0113 5 numbers
Gamma Telecom Holdings Limited holds 19.0% of the allocated numbers (70,000 numbers, 7 blocks).
| Holder | Share | Numbers | Blocks | Earliest allocation |
|---|---|---|---|---|
| Gamma Telecom Holdings Limited | 19.0% | 70,000 | 7 | 2018-07-18 |
| Colt Technology Services | 15.8% | 60,000 | 6 | 2019-02-12 |
| BT | 13.2% | 50,000 | 5 | 2018-07-04 |
| 24 Seven Communications Limited | 2.6% | 10,000 | 1 | 2021-07-19 |
| Antheus Telecom Limited | 2.6% | 10,000 | 1 | 2017-08-23 |
| Belgacom International Carrier Services SA | 2.6% | 10,000 | 1 | 2021-06-09 |
| Callitech Limited | 2.6% | 10,000 | 1 | 2017-09-20 |
| EG TECHNOLOGIES LIMITED | 2.6% | 10,000 | 1 | 2020-01-21 |
| ICUK Computing Services Limited | 2.6% | 10,000 | 1 | 2019-08-12 |
| IP Voice Networks Ltd | 2.6% | 10,000 | 1 | 2017-09-20 |
| Infinity Tracking Ltd | 2.6% | 10,000 | 1 | 2018-11-20 |
| KCOM Group Ltd | 2.6% | 10,000 | 1 | 2022-09-08 |
| Magrathea Telecommunications Limited | 2.6% | 10,000 | 1 | 2019-09-09 |
| Odigo | 2.6% | 10,000 | 1 | 2020-03-16 |
| Onvoy Communications Ltd. | 2.6% | 10,000 | 1 | 2022-04-08 |
| PEERLESS NETWORK UK LIMITED | 2.6% | 10,000 | 1 | 2019-09-05 |
| SONA BUSINESS PVT. LTD. | 2.6% | 10,000 | 1 | 2023-03-27 |
| SiPalto Ltd | 2.6% | 10,000 | 1 | 2019-11-05 |
| TELNYX UK LIMITED | 2.6% | 10,000 | 1 | 2020-04-28 |
| TalkTalk Communications Limited | 2.6% | 10,000 | 1 | 2018-07-31 |
| Tuxtel Ltd | 2.6% | 10,000 | 1 | 2026-01-20 |
| Twilio Ireland Limited | 2.6% | 10,000 | 1 | 2020-09-29 |
| Virgin Media Limited | 2.6% | 10,000 | 1 | 2018-01-31 |
Weekly changes for 01135
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 0113 Leeds. Methodology.
01135 source: Ofcom s1.csv, published 14 Oct 2026. Download 0113 5 blocks (CSV). Contains Ofcom copyright material.
Source detail · 01135
| Claim | Value | Identifier |
|---|---|---|
| allocated_numbers | 380000 | subcode:0113-5:allocated_numbers:fc227d9e:v1 |
| allocated_records | 38 | subcode:0113-5:allocated_records:fc227d9e:v1 |
| listed_holders | 23 | subcode:0113-5:listed_holders:fc227d9e:v1 |
| area_code | 0113 | subcode:0113-5:area_code:fc227d9e:v1 |
| first_digit | 5 | subcode:0113-5:first_digit:fc227d9e:v1 |
| snapshot_date | 14 Oct 2026 | subcode:0113-5:snapshot_date:fc227d9e:v1 |