outside picture of the National Insurance Number helpline centre

National Insurance number contact helplines

Please find below all the National insurance number contact phone numbers you will need. They include opening times, address and a brief statement on what to expect when using them.



New to the UK and need to apply for a National Insurance Number contact helpline

To apply for a National Insurance Number, you will need to contact the department for work and pensions (DWP). When applying for a UK National Insurance Number you will need to attend an interview at your local Job Centre Plus. This interview will be arranged on the phone for you. The numbers are listed below;

Telephone: 0800 141 2075
Textphone: 0800 141 2438

Application lines are open Monday to Friday, 8:00am to 6:00pm. They are closed Sundays and bank holidays.

Lost National Insurance Number contact phone number

If you have previously been issued a national insurance number but longer have confirmation or remember the number, you can contact the HMRC to receive confirmation. They are unable to pass on your number over the phone due to security purposes so you will receive a letter to your address instead. You can request a copy via phone but this method is not always successful. If you were unable to answer the questions via phone, we would recommend sending a CA5403 completed form to the HMRC. Alternatively, you can find it through your personal tax account via signing in on the Gov.uk site.

Telephone: 0300 200 3500
Textphone: 0300 200 3519
Outside UK: +44 191 203 7010

Opening times: Monday to Friday: 8am to 8pm and Saturday: 8am to 4pm. They are closed Sundays and bank holidays.

Northern and Southern Ireland National Insurance Number phone number

If you live in Northern Ireland you will need to contact a different helpline number. Please see below numbers;

Belfast area

Shaftesbury square office;

Telephone number: 020 9013 8286
Textphone number: 028 9054 2492

Opening hours: Monday to Friday from 9:00am – 5:00pm. The Address is Conor Building, 107 Great Victoria Street, Belfast, BT2 7AG.

Northern area

Lisnagelvin: 028 7185 5407 or 028 7185 5406

Opening hours: Monday to Friday from 9:00am – 5:00pm

Southern area

Portadown office: 028 7185 5406

Opening hours: Monday to Friday from 9:00am – 5:00pm

Update your personal details on your national insurance number phone number

If you need to update your personal details you will need to contact the the HMRC and let them know. Please have to hand your National Insurance Number when you phone.

Telephone: 0300 200 3300
Textphone: 0300 200 3319
Outside UK: +44 135 535 9022

Opening times: Monday to Friday: 8am to 8pm, Saturday: 8am to 4pm and Sunday: 9am to 5pm. They are closed bank holidays, Easter Sunday, Christmas Day, Boxing Day and New Year’s Day.


If you have any questions please leave a comment below, our admin team or our community will be able to help. Please let us know if any of the above information has any inaccuracies by sending an email to admin@nationalinsurancenumber.org.

2 Comments

  1. Robert Constantin parnica September 18, 2019
    • Admin September 19, 2019

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