WhoIsCalling.me.uk

Who called from 0800 138 3484

A freephone number.

How to block it

Did this number call you? What was it?

No one has reported this number yet. Reports appear here once 3 people have told us about it.

One report per number from each visitor. If you choose again, your new answer replaces the old one. By sending a report you agree to the terms of use. How reports work.

Who lists this number

We only show numbers an organisation publishes on its own website, with a quote from that page and the date we checked it.

Yorkshire Water

This number is listed by Yorkshire Water on its own website (Reporting pollution in a river or other water course).

Source: “spotted pollution in a water course, please call us on 0800 138 3484” (opens in a new tab). Checked 13 October 2026.

Every number Yorkshire Water publishes

This could still be a scam call

Criminals can make their number look like a genuine one (this is called spoofing). If someone calls from this number and asks for money, bank details, a code or passwords, hang up. Then call Yorkshire Water back on a number you've found yourself, such as the one on their own website or on a letter or bill from them.

Safe ways to check

What Ofcom’s records say

Number type
Freephone number (080)
Area or region
UK-wide
Not linked to a place
Cost to call
Free
Free to call from UK landlines and mobiles.
Allocated to
GCI Network Solutions Limited
This is the provider Ofcom allocated the number block to. It is not the caller, and the number may have moved network since.
Ofcom status
Allocated
Block 0800 138 xxxx
Allocated on
20 December 2023
Date Ofcom allocated the block

Source: Ofcom numbering data, files published 7 October 2026, checked 13 October 2026

See the 0800 138 xxxx range for the Ofcom facts about the whole block and any numbers in it that organisations or visitors have told us about.

What the provider and number type mean

Numbers starting 0800 and 0808 are freephone numbers, used by businesses, helplines, charities and government services.

Ofcom allocates phone numbers to communications providers in blocks. The provider shown is the one Ofcom allocated this block to. It is not the person or business that called you, and the number may since have moved to a different network, because people can usually keep their number when they switch provider. Ofcom does not hold information about individual numbers.

Ofcom says calls to 0800 and 0808 numbers are free from all consumer landlines and mobiles. If you are calling from a business line, check with your provider.

Report or block 0800 138 3484

Reporting helps networks and the police find the people behind scam calls. Blocking stops this one number, though scammers often switch numbers.

Report it

Block it

Your mobile network’s own help pages

Landline? See how to block calls on a landline.

Every link above goes to the organisation’s own page and was checked on 13 October 2026. More detail: report and block guide.

Is this your number? You can ask us to clear the visitor reports about it.

Sources and checks

This page relies on:

Checked on 13 October 2026. Read how reports work. How we check our information. Spotted a mistake? Tell us and we will put it right.