⚡ Quick Answer: Royal Mail’s PAF limits 100 addresses per postcode. This only affects postcode lookup services — your mail delivery at EC2A 4NA is not affected.

What Is the PAF Limit?

The Royal Mail Postcode Address File (PAF) limits deliverable addresses per postcode to 100. When exceeded, Royal Mail assigns a new postcode by changing the end digit.

How This Affects You

• Use EC2A 4NA for all correspondence — mail delivery is unaffected
• The limit only impacts the Royal Mail postcode lookup service (where you type a company name to find the postcode)
• When the 100-address limit is reached, a new postcode is generated with a slightly different end digit
• Even with a new postcode, you will still receive all your mail

Filing a Complaint with Royal Mail

If you wish to raise this with Royal Mail:

1. Email: customer.service@royalmail.com
2. Online form: Royal Mail complaint form
3. Phone: 03457 740 740

Common Questions

Will I still receive my mail?

Yes. Mail delivery is not affected by the PAF limit.

Do I need to change my postcode?

No. Continue using EC2A 4NA for all correspondence.

Why can’t I find my company in the postcode lookup?

The lookup service only lists up to 100 addresses per postcode. This does not affect mail delivery.

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Updated on: 28/03/2026