Banks and building societies
Cynergy Bank phone numbers
Edited by Richard BarkerChecked 14 October 2026
Cynergy Bank publishes 1 number for you to call and 2 numbers it says it may call you from on its own website. We list each one with the page it is on (1 page in all), a short quote from that page and the date we checked it.
Numbers Cynergy Bank says it may call you from
Cynergy Bank lists these 2 numbers on its own website. A call showing one of them is not proof it is Cynergy Bank, because numbers can be faked.
- 020 3901 7531
They may call you from this number
Customer services call back
Source: “their call will come from one of these phone numbers: +44 20 3901 7531” (opens in a new tab). Checked 14 October 2026.
- 020 3892 4149
They may call you from this number
Customer services call back
Source: “+44 20 3901 7531 or +44 20 3892 4149.” (opens in a new tab). Checked 14 October 2026.
Numbers to call Cynergy Bank
What each line is for, as Cynergy Bank describes it, with opening hours where it gives them.
- 0345 850 5555
You call them on this number
Customer services
Hours: 9am to 6pm Monday to Friday
Source: “Phone 0345 850 5555 (or +44 (0)20 3375 6422” (opens in a new tab). Checked 14 October 2026.
How scams that copy banks and building societies work
UK Finance describes the usual pattern: a caller says they are from your bank or the police, tells you there has been fraud on your account, and asks you to move your money to a "safe account". The criminal controls that account.
Stop Scams UK runs 159, which puts you through to your bank and cannot be spoofed. Hang up and call 159 or the number on the back of your card.
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 Cynergy Bank back on the number on the back of your card, or call 159, which connects you to your bank.
Safe ways to check
- Call 159 (opens in a new tab): Stop Scams UK runs 159, which connects you to your bank. It cannot be spoofed.
- Cynergy Bank's own contact page (opens in a new tab): Where this number is published.
- Report Fraud (opens in a new tab): Report fraud and cyber crime in England, Wales and Northern Ireland. In Scotland, call Police Scotland on 101.
- Forward scam texts to 7726 (opens in a new tab): It is free, and reports the message to your mobile provider.
- How number spoofing works: Why a genuine number on your screen does not prove who is calling.
Questions about Cynergy Bank’s numbers
Which numbers does Cynergy Bank say it calls from?
Cynergy Bank lists 2 numbers on its own website as numbers it may call you from, including 020 3901 7531, 020 3892 4149. Each one is in the table on this page with its source. Callers can fake a genuine number, so if you are unsure, hang up and contact Cynergy Bank on a number you have found yourself.
What numbers can I call Cynergy Bank on?
Cynergy Bank publishes 1 number for the public to call. They are: 0345 850 5555 (Customer services). Check the source page for each one before you call, as numbers and opening hours change.
Does Cynergy Bank publish a number on its own website that is not listed here? Suggest a number for Cynergy Bank.
Sources and checks
This page relies on:
Checked on 14 October 2026. Read how we build the directory. How we check our information. Spotted a mistake? Tell us and we will put it right.