Range holder · Ofcom numbering snapshot published 23 Sep 2026
IV Response Limited: Ofcom-listed range holder, not evidence of who called
What does Ofcom list for IV Response Limited?
IV Response Limited is listed by Ofcom as the holder of 177 number blocks (1,815,000 numbers) in the snapshot published 23 Sep 2026, across 69 area codes and 5 number families (geographic, 09, 08, 07, 03). Most of its numbers are in geographic ranges. Check the number below.
Did not expect the call? Do not call back; contact the organisation on a number you find yourself.
A range holder is usually a network or wholesale provider that supplies numbers to other businesses. This Ofcom listing records an allocation only; it is not evidence about the range holder or caller. A number ported to another network still shows its original range holder here.
If a caller ID shows a IV Response Limited number and you did not expect the call, do not call back; contact the organisation you think it was on a number you find yourself.
| Status | Blocks |
|---|---|
| Allocated | 177 |
| Allocated (Closed Range) | 0 |
| Quarantined, still listed | 0 |
| Quarantined, no longer listed since 19 Aug 2026 | 0 |
Source: Ofcom numbering data s1.csv, s3.csv, s7.csv, s8.csv, s9.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 s1.csv 002caad0, s3.csv 94449a74, s7.csv 13a4e778, s8.csv 10b9b165, s9.csv 42682da4 · n = 177 blocks · method: block capacity from number length · release 6d60d6b0 · CSV
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Check the number privately
Enter a number below. The lookup runs privately in your browser and returns the Ofcom block status with a callback rule.
Local lookup
Enter the number that called
Your full number does not leave this page. A lookup downloads only the relevant four-digit prefix-class file.
| Lookup | Method |
|---|---|
| Ofcom block | Private lookup in this browser |
Source: Ofcom numbering data s1.csv, s3.csv, s7.csv, s8.csv, s9.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 s1.csv 002caad0, s3.csv 94449a74, s7.csv 13a4e778, s8.csv 10b9b165, s9.csv 42682da4 · n = 177 blocks · method: block capacity from number length · release 6d60d6b0 · CSV
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What should I do after an unexpected call?
IV Response Limited is the range holder, not necessarily the organisation that called: numbers in its blocks are often used by its business customers.
| Step | Action |
|---|---|
| 1 | Do not call back a number you cannot identify. If it rang once and cut off, that is often a test that your line is live. |
| 2 | If the caller said they were your bank, a company or the police, hang up and phone the organisation on a number you find yourself, or call 159 for your bank. |
| 3 | Forward suspicious text messages to 7726, free of charge. |
| 4 | If you lost money or shared details, contact your bank at once and report to Action Fraud (England, Wales and Northern Ireland) or Police Scotland. |
| 5 | For unwanted marketing calls, report to the ICO and block the number on your phone. |
| 6 | Calls to 01 and 02 numbers are charged at your provider’s standard landline rate (gov.uk/call-charges). |
Source: Ofcom numbering data s1.csv, s3.csv, s7.csv, s8.csv, s9.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 s1.csv 002caad0, s3.csv 94449a74, s7.csv 13a4e778, s8.csv 10b9b165, s9.csv 42682da4 · n = 177 blocks · method: block capacity from number length · release 6d60d6b0 · CSV
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Which kinds of numbers does IV Response Limited hold?
Of the 1,815,000 numbers listed to IV Response Limited in the snapshot published 23 Sep 2026, 47.9% are geographic numbers. The chart shows how its own numbers split across number families.
| Family | Numbers | Blocks | Share of this holder's numbers |
|---|---|---|---|
| geographic | 871,000 | 88 | 47.9% |
| 09 | 470,000 | 47 | 25.9% |
| 08 | 324,000 | 36 | 17.9% |
| 07 | 100,000 | 1 | 5.5% |
| 03 | 50,000 | 5 | 2.8% |
Source: Ofcom numbering data s1.csv, s3.csv, s7.csv, s8.csv, s9.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 s1.csv 002caad0, s3.csv 94449a74, s7.csv 13a4e778, s8.csv 10b9b165, s9.csv 42682da4 · n = 177 blocks · method: block capacity from number length · release 6d60d6b0 · CSV
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Which area codes are IV Response Limited numbers in?
IV Response Limited holds blocks in 69 UK area codes. The table lists the 10 codes where it holds the most numbers, with the place Ofcom lists for each; the full list is in the CSV.
| Area code | Place | Numbers | Blocks |
|---|---|---|---|
| 028 | Ballycastle, Martinstown, Ballymena, Ballymoney, Larne, Kilrea, Newry, Armagh, Portadown, Banbridge, Rostrevor, Kircubbin, Newcastle (Co. Down), Downpatrick, Enniskillen, Lisnaskea, Kesh, Coleraine, Londonderry, Limavady, Magherafelt, Carrickmore, Newtownstewart, Omagh, Ballygawley, Cookstown, Dungannon, Fivemiletown, Belfast, Bangor (Co. Down), Lisburn, Ballyclare, Antrim, Saintfield | 190,000 | 19 |
| 020 | London | 20,000 | 2 |
| 0113 | Leeds | 10,000 | 1 |
| 0114 | Sheffield | 10,000 | 1 |
| 0116 | Leicester | 10,000 | 1 |
| 0117 | Bristol | 10,000 | 1 |
| 0118 | Reading | 10,000 | 1 |
| 01205 | Boston | 10,000 | 1 |
| 0121 | Birmingham | 10,000 | 1 |
| 01226 | Barnsley | 10,000 | 1 |
and 59 more in the CSV
Source: Ofcom numbering data s1.csv, s3.csv, s7.csv, s8.csv, s9.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 s1.csv 002caad0, s3.csv 94449a74, s7.csv 13a4e778, s8.csv 10b9b165, s9.csv 42682da4 · n = 177 blocks · method: block capacity from number length · release 6d60d6b0 · CSV
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Has anything changed in IV Response Limited’s blocks, and what was allocated recently?
Between the weekly Ofcom files fetched on 19 Aug 2026 and 24 Sep 2026, none of IV Response Limited’s blocks changed status or holder. No block of IV Response Limited has an allocation date in the last 12 months.
Ofcom: “Please note that transferred numbers will also be shown as ‘allocated’.” (numbering data, ofcom.org.uk, retrieved 24 Sep 2026)
| Weekly transition | 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 |
Source: Ofcom numbering data s1.csv, s3.csv, s7.csv, s8.csv, s9.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 s1.csv 002caad0, s3.csv 94449a74, s7.csv 13a4e778, s8.csv 10b9b165, s9.csv 42682da4 · n = 177 blocks · method: block capacity from number length · release 6d60d6b0 · CSV
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Since when has IV Response Limited held its number blocks?
The earliest allocation date recorded for IV Response Limited’s blocks is 2002; 0 of its 177 blocks carry a date from 2020 onwards. Recorded dates are provisional: a block that moved to another provider may show the date of that move rather than its first allocation.
| Recorded years | Allocated blocks |
|---|---|
| 1994–1999 | 0 |
| 2000–2004 | 51 |
| 2005–2009 | 123 |
| 2010–2014 | 3 |
| 2015–2019 | 0 |
| 2020–2024 | 0 |
| 2025–2029 | 0 |
Source: Ofcom numbering data s1.csv, s3.csv, s7.csv, s8.csv, s9.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 s1.csv 002caad0, s3.csv 94449a74, s7.csv 13a4e778, s8.csv 10b9b165, s9.csv 42682da4 · n = 177 blocks · method: block capacity from number length · release 6d60d6b0 · CSV
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Where do these numbers come from, and how do I cite this page?
Rangecheck, “IV Response Limited — Ofcom numbering snapshot published 23 Sep 2026”, release 6d60d6b0, https://rangecheck.co.uk/operators/iv-response-limited/, retrieved 24 Sep 2026. Contains Ofcom copyright material: numbering data (ofcom.org.uk).
How to cite · Contains Ofcom copyright material
| Field | Value |
|---|---|
| Release | 6d60d6b0 |
| Source published | 23 Sep 2026 |
| Source fetched | 2026-09-24 18:00 UTC |
| Source files | s1.csv, s3.csv, s7.csv, s8.csv, s9.csv |
Source: Ofcom numbering data s1.csv, s3.csv, s7.csv, s8.csv, s9.csv, published 23 Sep 2026, fetched 2026-09-24 18:00 UTC, sha256 s1.csv 002caad0, s3.csv 94449a74, s7.csv 13a4e778, s8.csv 10b9b165, s9.csv 42682da4 · n = 177 blocks · method: block capacity from number length · release 6d60d6b0 · CSV