How much does it cost to call a 01720 number?

Calls to 01720 numbers are standard geographic landline calls, charged at your provider’s normal UK landline rate and usually included in inclusive minutes — the same as calling an 03 number.

I had a missed call from a 01720 number — is it a scam?

Not necessarily, but be careful: scammers spoof local codes such as 01720 so a call looks like it’s from Isles of Scilly and you’re more likely to answer. If in doubt, hang up and call the organisation back on a number you find independently.

How do I dial a Isles of Scilly number from abroad?

Drop the leading 0 and add +44. A number written as 01720 XXXXXX becomes +44 1720 XXXXXX when dialled internationally.

Can this tool tell me who owns the number?

No. It shows the area of the dialling code and the provider Ofcom allocated the number range to — not the individual or business holding a specific number, which may also have been ported to another network.

01720 Area Code – Isles of Scilly | Dialling Code, Format & Call Charges

Q: Where is the 01720 area code?

01720 is the UK geographic dialling code for Isles of Scilly. Any number written as 01720 XXXXXX is tied to the Isles of Scilly dialling-code area, though with modern VoIP a business can keep its 01720 number after moving away.

Dialling code: 01720
Area: Isles of Scilly
Number type: Geographic landline (01/02)
Local format: 01720 XXXXXX
From abroad: +44 1720 XXXXXX
Ofcom number blocks: 523
Blocks in service: 81
Range holders: 78

Where is the 01720 area code?

The 01720 dialling code is the UK geographic area code for Isles of Scilly. Because 01720 is a geographic (01/02) code, a number using it is tied to the Isles of Scilly dialling-code area — though with modern hosted telephony (VoIP) a business can keep a 01720 number after moving premises, so the code reflects the number’s designated area rather than a guaranteed physical location today.

Ofcom currently lists 523 number blocks under 01720, of which 81 are allocated to 78 communications providers.

Isles of Scilly phone number format

A Isles of Scilly number is made up of a 5-digit area code followed by a 5 or 6-digit local number. Written in full it looks like 01720 XXXXXX (the Xs stand for the local digits). Ofcom has not reserved a fictitious drama range for 01720; for on-screen examples it recommends the unused 01632 960000–01632 960999 range.

Who holds 01720 number ranges?

Ofcom allocates 01720 numbers to providers in blocks. These providers hold the largest allocations under 01720:

Range holder (allocated by Ofcom)	Number blocks	Example range
Digital Space Group Limited	2	`01720 24XXXX`
Fuse 2 Communications Ltd	2	`01720 627XXX`
TalkTalk Communications Limited	2	`01720 288XXX`
(AQ) LIMITED	1	`01720 27XXXX`
24 Seven Cloud Communications Ltd	1	`01720 731XXX`
API Telecom Limited	1	`01720 431XXX`
AQL Wholesale Ltd	1	`01720 30XXXX`
Adepteo Limited	1	`01720 625XXX`

…and 70 more providers hold smaller allocations in this range.

Ofcom’s data shows the provider each number range was originally allocated to — not who holds an individual number today. Numbers are frequently moved (ported) between providers, and no public database reveals the person or business behind a specific number, so treat any service that claims to with suspicion.

01720 number ranges

Browse the allocated 01720 ranges by their first local digit — each guide lists the providers holding that slice of Isles of Scilly’s numbers:

01720 2XXXXX · 10 ranges 01720 3XXXXX · 13 ranges 01720 4XXXXX · 15 ranges 01720 5XXXXX · 9 ranges 01720 6XXXXX · 25 ranges 01720 7XXXXX · 9 ranges

Call charges for 01720 numbers

Calls to 01720 geographic numbers are charged at your phone provider’s standard UK landline rate and are normally included in inclusive call minutes. UK-wide 03 numbers are guaranteed by Ofcom to cost the same as 01/02 calls, while 084, 087 and 09 numbers cost considerably more — always check the prefix before you dial.

Spotting spoofed 01720 scam calls

Fraudsters frequently spoof local dialling codes, faking the caller ID so a scam call appears to come from a Isles of Scilly (01720) number you might trust. Remember:

A familiar 01720 area code is not proof the caller is local or genuine — caller ID can be faked.
Banks, HMRC and the police will never ask you to move money or share passwords or one-time codes over the phone.
If a call feels off, hang up, wait a moment, and call the organisation back on a number from their official website or your statement.
Report nuisance calls to the ICO and forward scam texts to 7726 (free).

Other dialling codes in this range

Numerically adjacent UK dialling codes:

01708 Romford Area code guide 01709 Rotherham Area code guide 01721 Peebles Area code guide 01722 Salisbury Area code guide

Browse all UK area-code guides ›

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01720 area code – Isles of Scilly