01727 Area Code — St Albans, Bernards Heath & Harpenden
01727 is the UK dialling code for St Albans in Hertfordshire, also serving Bernards Heath, Harpenden and Sopwell, allocated by Ofcom under the National Telephone Numbering Plan. Our database has tracked 139 distinct 01727 numbers across 178 public lookups.
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Quick facts
Area code
01727
Location
St Albans
County
Hertfordshire
Region
East of England
Number type
Geographic landline
Number format
01727 XXX XXX
Operators serving
8+
Call cost
Standard rate
About the 01727 dialling code
01727 is the UK geographic dialling code for St Albans, allocated by Ofcom under the National Telephone Numbering Plan. It is used by landlines — and increasingly VoIP lines — registered to the St Albans area.
A full St Albans number is normally written as 01727 XXXXXX. You can dial the local part on its own from within the same area, or the full number from anywhere in the UK.
Because of UK number portability and internet calling, a 01727 number no longer guarantees the caller is physically in St Albans. Fraudsters also "spoof" local codes like 01727 so an unknown call looks like a nearby business or neighbour — so treat an unexpected call on what is actually said, not on the area code alone.
Map of the 01727 dialling area
The marker shows St Albans; the shaded circle is an approximate indication of the area the 01727 code serves — exact Ofcom charging-area boundaries are irregular and don't follow a neat radius.
Map data © OpenStreetMap contributors. View larger map
Areas typically served by 01727
Settlements in and around the St Albans dialling area that typically use 01727 numbers. Approximate — Ofcom charging-area boundaries don't follow town or county lines exactly, and properties near a boundary may take a neighbouring code.
Calling 01727 from abroad
From outside the UK, dial your international access prefix, then the UK country code 44, then 1727 (the area code without its leading zero) and the local number.
| Calling from | Dial |
|---|---|
| United States & Canada | 011 44 1727 … |
| Europe / most of the world | 00 44 1727 … |
| Australia | 0011 44 1727 … |
| Any mobile phone | +44 1727 … |
History of the 01727 code
The code was 0727 until PhONEday, 16 April 1995, when a "1" was inserted after the leading zero to create 01727.
Top searched 01727 numbers
These are the 01727 numbers most-looked-up by visitors to our number checker. Click any number to see its full lookup page with risk-level, range holder, and community reports.
| Number | Searches | Last looked up |
|---|---|---|
| 01727 636148 | 8 | 10 Jul 2026 |
| 01727 229171 | 6 | 24 Jun 2026 |
| 01727 229210 | 5 | 5 Jul 2026 |
| 01727 641593 | 4 | 7 Jul 2026 |
| 01727 737110 | 4 | 24 Jun 2026 |
| 01727 326293 | 3 | 19 Jun 2026 |
| 01727 814469 | 3 | 16 Jun 2026 |
| 01727 229208 | 3 | 5 Jun 2026 |
| 01727 808939 | 3 | 2 Jun 2026 |
| 01727 884778 | 2 | 6 Jul 2026 |
| 01727 226406 | 2 | 6 Jul 2026 |
| 01727 323415 | 2 | 2 Jul 2026 |
| 01727 809413 | 2 | 28 Jun 2026 |
| 01727 809548 | 2 | 28 Jun 2026 |
| 01727 809417 | 2 | 26 Jun 2026 |
| 01727 818474 | 2 | 25 Jun 2026 |
| 01727 229211 | 2 | 11 Jun 2026 |
| 01727 830414 | 2 | 11 Jun 2026 |
| 01727 763210 | 1 | 10 Jul 2026 |
| 01727 229201 | 1 | 9 Jul 2026 |
Is a call from 01727 safe?
Most 01727 calls are ordinary local calls from St Albans homes and businesses. The main risk to be aware of is "neighbour spoofing", where a scammer fakes a local 01727 prefix so you are more likely to answer. Never share bank details, passwords or one-time security codes with an unexpected caller, even when the number looks local — hang up and call the organisation back on a number you have verified yourself.
To call a 01727 (St Albans) number from outside the UK, drop the leading zero and dial +44 1727 followed by the local number.
Operators serving St Albans
These UK communications providers have been allocated 01727 number blocks by Ofcom. The number of blocks per operator gives a rough sense of how widely each provider serves this area.
| Provider (Ofcom-allocated) | Allocated blocks |
|---|---|
| Virgin Media Limited | 20 |
| BT | 19 |
| Vodafone Ltd (C&W) | 16 |
| GCI Network Solutions Limited | 11 |
| Sky UK Limited | 8 |
| Gamma Telecom Holdings Limited | 6 |
| Colt Technology Services | 5 |
| GTT-EMEA LTD | 4 |
Ofcom number ranges on 01727
Ofcom's National Numbering Plan lists 505 number blocks under 01727, of which 205 are allocated to 111 communications providers. The first allocated blocks are shown below — look up any full number with the number checker to see its exact range holder.
| Number block | Status | Range holder (Ofcom-allocated) |
|---|---|---|
0172720… | Allocated | Vodafone Ltd (C&W) |
01727212… | Allocated | GTT-EMEA LTD |
01727216… | Allocated | GTT-EMEA LTD |
01727217… | Allocated | GTT-EMEA LTD |
01727219… | Allocated | GTT-EMEA LTD |
0172722… | Allocated | Gamma Telecom Holdings Limited |
0172723… | Allocated | Magrathea Telecommunications Limited |
0172724… | Allocated | GCI Network Solutions Limited |
01727250… | Allocated | DRD Communications Limited |
01727251… | Allocated | DRD Communications Limited |
0172726… | Allocated | AQL Wholesale Ltd |
01727270… | Allocated | Vodafone Ltd (C&W) |
Showing 12 of 205 allocated blocks. Source: Ofcom telephone numbering data, updated weekly.
How to block and report 01727 spam calls
Block or report 01727
- You can block 01727 directly from your recent-calls list on iPhone or Android, and forward scam texts free to 7726.
- Scam or fraud calls should be reported to Action Fraud (0300 123 2040) or Police Scotland (101); persistent marketing calls to the ICO / TPS.
Full step-by-step instructions for every phone, network-level blocking and all UK reporting routes are in our guide: How to block and report unwanted calls in the UK.
How to stop unwanted calls for good
Blocking 01727 numbers stops that one number, but determined nuisance callers simply switch numbers. Silencing unknown callers, enabling your network's free spam shield and registering with the TPS cut the volume across the board — our canonical guide walks through each step: How to block and report unwanted calls in the UK.
Frequently asked questions about the 01727 code
Where is the 01727 area code?
The 01727 area code is allocated by Ofcom to St Albans in Hertfordshire, United Kingdom. It is a geographic UK landline dialling code under the National Telephone Numbering Plan. The surrounding dialling area also takes in Bernards Heath, Harpenden, Sopwell and nearby villages.
Is 01727 always a St Albans number?
Numbers with the 01727 prefix were originally allocated by Ofcom to St Albans. With UK number portability and VoIP allowing geographic relocation while keeping the same number, the call origin can differ from the original area, but the prefix's official assigned location remains St Albans.
How do I block 01727 spam calls?
On iPhone, tap the (i) next to the number in Recents and choose Block this Caller. On Android, long-press the number in Recents and choose Block. To prevent unknown 01727 numbers ringing, enable Settings → Phone → Silence Unknown Callers (iPhone) or your dialler's spam filter (Android). Forward spam texts to 7726 free of charge.
How much does a 01727 call cost?
Calls to UK 01727 geographic numbers are charged at your provider's standard rate and are usually included in inclusive minutes on any modern landline or mobile plan.
Neighbouring dialling codes
Codes covering areas around St Albans — useful when a caller is nearby but outside the 01727 boundary.
Living in or moving to St Albans?
Our free postcode reports cover house prices, crime, broadband and schools for the districts around St Albans.
Check another UK number
Have the full 10- or 11-digit number? The UK Phone Number Checker shows the Ofcom range holder, risk level, and any community reports for that specific number.