Talk:UK telephone numbering plan

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Contents 1 08xx codes 2 Guernsey 3 Hull does it different 4 Nit on UK number plan descriptions 5 Short codes for mobile SMS 6 Moved from main page 7 4 and 5 figure numbers 8 020 for London 9 dates in number shortage section 10 were uk national phone numbers always fixed length 11 utilisation of current area codes 12 does 911 really work on uk mobile phones 13 freephone 14 Caps/space in "PhONE Day" 15 Northern Ireland numbering by county 16 Local Exchange Codes 17 VOIP Issued National Dialling 18 To put it simply... 19 Short codes to a neighbouring exchange 20 RoI 000x codes

[edit] 08xx codes

I've shuffled the 08xx codes section around a bit, but there are still some discrepancies, as listed at Ofcom's Numbering Scheme page. Would it be better to incorporate this information fully, or leave a link to Ofcom's official list? I'll leave it alone for now. Sargant 01:01, 7 Jul 2004 (UTC)

[edit] Guernsey

The BT Archives and BT Group plc#History of BT both cite Guernsey as being independant phoneswise. -- RHaworth 10:50, 2005 Jan 9 (UTC)

[edit] Hull does it different

(Adapted from an email sent to Hull Corporation Telephone Department). I had a good laugh at your National Numbering Groups List. Someone in your company has had great fun thinking up new names for some of the groups, for example Stonehenge instead of Amesbury. I am all in favour of a bit of individuality but I would count the following as errors:

• 1327 Northamptonshire is too vague - call it Daventry
• 1381 Cromarty is spelled wrong
• 1389 Dumbartonshire is too vague - call it Dumbarton (plus, the county name is Dunbartonshire)
• 1400 Loveden (Lincs) is spelled wrong, was never an exchange name and is not a village name - call it Honington
• 1451 Cotswold is spelled wrong and also too vague - call it Stow-on-the-Wold
• 1725 Downton (Wilts) is spelled wrong and needs county name - call it Rockbourne
• 1889 Rocester is spelled wrong and could be confused with the Medway town - call it Dapple Heath or Rugeley

But by all means keep bonny Udny instead of Old Meldrum and many other similar variations from Ofcom's list of NNG names (on Page 16 of a large PDF) - I hesitate to call it the official list. There is also a very nice Charge Groups Map which uses the original GPO names, eg. 1354 variously called Doddington (GPO list), Chatteris (Ofcom list) or March (Cambs) (Hull list).

RHaworth 03:04, 2005 Jan 11 (UTC)

1889 is obviously 1UT9 - Uttoxeter. 82.36.26.229 03:54, 16 March 2006 (UTC)

I'm not sure that it's helpful to describe (01xxx) as the "most common" format. It implies that the greatest number of subscriber-numbers have such codes, and that may well not be the case, not least because many of the other code-types cover cities. Also, I believe there are still some five-digit subscriber numbers.

I agree. I read recently that more numbers are now (02x) xxxx xxxx in the UK than any other format. I can't remember where I read this though but it's hardly suprising given the major population centres covered. There are of course more codes of 01xxx which would give one the false idea that this is the most common number format - combined with the fact mobiles also follow that format. Mrsteviec 14:33, 13 Feb 2005 (UTC)

And here it is from Ofcom website [1] "Since the code and number changes in the year 2000, most numbers in the UK have a 3-digit code beginning ‘02X' followed by an 8-digit local number eg ‘020' for London, ‘028' for Northern Ireland, etc." Mrsteviec 06:34, 31 May 2005 (UTC)

Is there a role for some rules for geographical numbers and codes? For example:

• numbers are five, six, seven or eight digits long
• five- and six-digit numbers have no spaces in them
• seven-digit numbers are arranged xxx xxxx
• eight-digit numbers are arranged xxxx xxxx
• 01 codes are four or five digits long
• four-digit 01 codes are 01x1 or 011x
• 02 codes are three digits long
• numbers with four-digit codes have seven digits
• numbers with five-digit codes have five or six digits
• numbers with 02 codes have eight digits.

Is there a role for an illustration of the only acceptable numbers, i.e.:

• (01xxx) xxxxx
• (01xxx) xxxxxx
• (01x1) xxx xxxx
• (011x) xxx xxxx
• (02x) xxxx xxxx?

I'd suggest the above simple list clarifies an apparently complex situation and might just help stop the wide range of liberties taken. It's important to get across that the only proper punctuation is parentheses (no hyphens) and that spaces matter.

--Pauldanon 11:43, 13 Feb 2005 (UTC)

You have missed out (01xxxx) xxxxx and (01xxxx) xxxx. Also all-figure numbers (in director areas such as Birmingham, Edinburgh, Glasgow, Liverpool and Manchester) are allowed to be shown in the traditional all-figure format: 01x1-xxx xxxx. But this doesn't apply to London (since 020 came into effect) and Tyneside, Wearside & Durham (0191 was never an all-figure area). Rapido 16:03, 8 March 2006 (UTC)

The second space is far less important to get right than the first because it says nothing about how the number is dialed. I'm not sure if it actually has a consistant meaning or not regarding how numbers are allocated and where they are portable to though. Plugwash 02:15, 28 December 2005 (UTC)

[edit] Nit on UK number plan descriptions

Strictly, the description of 01xxx as a five digit code is not quite correct. It's a 4 digit code - you ignore the initial STD trunk digit (i.e. the 0) when counting the number of digits. The Ofcom list of administered blocks does this, and so should you.

Thus, in section 2, subtract one from all of the entries, so that five digit area codes become four digit area codes, and so on.

For example, the area code for London is 20 (a two digit code), whilst Romsey has a four digit code (1794).

One final note: The area code for Southampton and for Portsmouth is 23. Calls from a Southampton number (02380 x xxxx) to a Portsmouth number (023 92 x xxxx) are not local calls, even though they're within the same area code.

Lawrence

First part of that done; as for Southampton vs. Portsmouth, it's not immediately clear to me how best to phrase that,

Of course, you can be bold and edit it yourself, you know ;-)

James F. (talk) 15:08, 3 Mar 2005 (UTC)

You didn't even give yourself a breath before you contradicted yourself:

• "Southampton number (02380 ....)"
• "Portsmouth number (023 ....)"
• "even though they're within the same area code"

But as you probably know, the third of these statements is correct. I think you meant "Southampton number (023 80xx xxxx) to a Portsmouth number (023 92xx xxxx)". And we ought to clarify what is meant exactly by "local calls".... -- Smjg 01:10, 15 September 2006 (UTC)

[edit] Short codes for mobile SMS

I notice that many SMS services use "short codes"; are these allocated by mobile providers, or some other organization, and are they part of some official numbering scheme? -- Anon.

The Mobile Data Association (http://www.mda-mobiledata.org/mda/) have a good section on short codes (http://www.text.it/business/default.asp?intPageID=383) Owain 11:32, 17 Mar 2005 (UTC)

[edit] Moved from main page

It is likely that the entire country will receive 02x numbers. This is my own theory (numbers spiralling clockwise through England): 020 London and East of England, 021 East Midlands, 022 Southwest England, 023 Southeast England, 024 West Midlands, 025 Yorkshire and the Humber, 026 Northwest England, 027 Northeast England, 028 Northern Ireland, 029 Wales - all phone codes straddling borders will take the number from the region in which the largest settlement stands. Scotland I give 030 (02* and 02# may not work on some mobile phones). Other phone codes will be written in the format (0xx) xxxx xxxx - this works surprisingly well, especially on mobiles, divided into 077, 078 and 079.

I moved this from the main page as it is discussion. It is true that when 01xxx or 01xx area codes run out of numbers they will become an 02x code or be made part of a suitable adjacent 02x area code. This is on the OFCOM website somewhere I beleive. It will take ages to implement as they are not allowed to change numbers just so it fits in to a nice pattern, rather they have to wait until there is a genuine number shortage. If I find the source I will put something in the article regarding this. Mrsteviec 20:14, 29 Apr 2005 (UTC)

Sounds like speculation to me. And my hypothesis is that 021 is being left deliberately vacant until Birmingham runs out of numbers. 82.36.26.229 00:36, 28 February 2007 (UTC)

[edit] 4 and 5 figure numbers

I see no mention of subscriber numbers with fewer than 6 figures. They are also acceptable in the current numbering system:

(01xxx) xxxxx - 4 figure code, 5 figure subscriber number
(01xxxx) xxxxx - 5 figure code, 5 figure subscriber number
(01xxxx) xxxx - 5 figure code, 4 figure subscriber number

just theoretially acceptable or actually used anywhere? Plugwash 02:18, 28 December 2005 (UTC)

They are used, especially around the Lake District. If you don't believe me, then try them!

See: http://www.majesticselfdrive.co.uk/ - Bolton (01204) 62335

and: http://www.edenconservation.co.uk/ - Sedburgh (015396) 23261

and finally: http://www.bramptonmedicalpractice.com/ - Brampton (016977) 2551

Rapido 15:53, 8 March 2006 (UTC)

[edit] 020 for London

Someone messed up all the formatting for London numbers (again). There is only ONE code for London, and it is 020. Not 0207, not 0208, not 0203. See the Ofcom FAQ at http://www.ofcom.org.uk/telecoms/ioi/numbers/lonareacod/faqlondon.pdf . Formatting as , e.g. 0207 xxx xxxx is confusing because it implies that you can dial the local number xxx xxxx within London, which you can't, because London phone numbers are 8 digits long.

(If it is of any interest the relevant edit was made from a University of Northumbria at Newcastle IP address)

In fact, OFCOM have expressed concerns about automatic exchanges being incorrectly coded as 0207/0208, in that they may then not treat 020 3xxx numbers as London numbers causing various complications.

This also happens to ranges of VOIP numbers that start 05*. Many switchboards are coded to only allow 01* and 02* etc. Mrsteviec 11:12, 31 October 2005 (UTC)

so how *are* people supposed to configure thier switchboard so they don't get nasty surprises on the phone bill other than by whitelisting prefixes they know thier carrier will charge them a reasonable rate for? Plugwash 02:20, 28 December 2005 (UTC)

The call return service on some networks still has bugs in reading out such numbers. Talk Talk's is even weirder: I recently caught it giving "02072" before the first pause.

[edit] dates in number shortage section

this sections gives one date for each change, at least for "phone day" and presumablly for the others i belive thier should be two dates. One where the new started working and one where the old stopped working! Plugwash 01:57, 28 December 2005 (UTC)

[edit] were uk national phone numbers always fixed length

and if not when were they made fixed length? Plugwash 01:58, 28 December 2005 (UTC)

No. Back in the 1970s I had a 4-digit dialling code (5 with the leading 0) and 3-digit local number. -- Arwel (talk) 02:04, 31 December 2005 (UTC)

Fixed length? What are you talking about? UK numbers have never been of fixed length. Rapido 13:14, 28 March 2006 (UTC)

Sorry but I beg to differ! After the introduction of STD they did approximate to a fixed length (n, or n+1), but I can't remember how many digits n was - what I do remember was the exchange waiting a moment after dialling n and before connecting, just to make sure that you didn't dial that extra digit. Zir 10:56, 28 September 2006 (UTC)

Hi - I went out with a girl who lived in a small village on the Somerset / Wiltshire border and the STD code was 0985*** (can't remember the last three numbers, but the code was based on the Warminster code). Her number was therefore just *** within the village. That was 1989.

Are you sure it wasn't an STD code of 098 5x followed by a 3 figure number? 098 53 Maiden Bradley, 098 54 Sutton Veny, 098 55 Codford St Mary and 098 56 Wylye (all those exchanges used 3 figure numbers, I believe). An STD code of seven figures (six digits after the 0) was impossible unless someone can prove me wrong! Rapido 14:00, 30 June 2006 (UTC)

[edit] utilisation of current area codes

does anyone know where this info can be found? Plugwash 20:46, 30 December 2005 (UTC) All info at http://www.ofcom.org.uk/telecoms/ioi/numbers/numbers_administered/

[edit] does 911 really work on uk mobile phones

and if so is it an officially supported feature or just something done by some networks to help roaming americans? Plugwash 01:26, 31 December 2005 (UTC)

No it doesn't. The supported emergency numbers are 999 and 112. -- Arwel (talk) 02:03, 31 December 2005 (UTC)

[edit] freephone

i seem to remember hearing from an ISP that a freephone number (i think it was an 0500 one) was going to cost national rate to call from then on (and giving a new freephone number). anyone else heared anything similar? Plugwash 20:29, 19 January 2006 (UTC)

[edit] Caps/space in "PhONE Day"

Does anybody else write it as "PhONE Day"? The logo was in all caps, and with the "ONE" bit on a coloured background and at an angle to make it stand out. Most webpages write it as "PhONEday", and in my piece I have it as "phONEday" as this effectively matches the pattern of the logo. -- Smjg 14:27, 15 March 2006 (UTC)

[edit] Northern Ireland numbering by county

The article includes

The prefixes for existing numbers in Northern Ireland are split up into 7 groups,
roughly based upon the county in which the main exchange is based. The initial digit
of each phone number is based on the designated county - for example, the first county
alphabetically is County Antrim so numbers in this county start 2.

That may be true for the examples given but it's not true in general. Antrim town itself mostly has numbers starting 94 and many Newry numbers start 30. If there is any logic behind the allocation of numbers, it would be good to include it but otherwise we should just delete this bit. --Cavrdg 06:47, 18 April 2006 (UTC)

See the table on Big Number Change. The "Greater Belfast" area numbers all begin wih 9x. Other than that the pattern seems to fit pretty well. Owain (talk) 18:21, 30 June 2006 (UTC)

[edit] Local Exchange Codes

For completeness, the article really ought to include some mention of local exchange codes which further divided the 'subscriber code' number. Although they are now largely obsolete to the user, they are still often distinguished by a space or pause when quotating a number, e.g. 01xx xxx xxxx. Many of these codes also carry historical alphabetic meaning and until a certain date (any ideas, early '90s?) could be omitted for dialing within that exchange area in smaller areas. Mobile phone numbers also do something similar, with four-digit sub-codes originally allocated to operators. --Fursday 15:00, 21 June 2006 (UTC)

I'm a bit lost here, could you elaborate or give an example? Rapido 14:02, 30 June 2006 (UTC)

Like 021-373 == ERDington. Owain (talk) 18:18, 30 June 2006 (UTC)

BTW, if User:RHaworth hasn't already pointed it out, there is his list at http://www.rhaworth.myby.co.uk/phreak/tenp_0x1.htm Owain (talk) 18:28, 30 June 2006 (UTC)

[edit] VOIP Issued National Dialling

left of main page: source? the national numbering plan explicitly forbids use of national dialing only ranges in any situation where a human will be dialing it!

but for some strange reason some VOIP companies have issued them, like vonage [2] —The preceding unsigned comment was added by 81.105.97.247 (talk • contribs) .

[edit] To put it simply...

Can you please generalise the phone number format for the UK?

[edit] Short codes to a neighbouring exchange

Hello..

I'm sure I recall dialling a two digit short code to connect to a neighbouring exchange followed by the four digit telephone number in the early 80s, i.e. from Hertford to Ware I think 92xxxx would connect you to phone number xxxx on the Ware exchange.

Is there a list of these anywhere or is it just a figment of my imagination?

Ta C2r 14:47, 27 January 2007 (UTC)

[edit] RoI 000x codes

Interesting how 0003 and 0008 were left unused - the obvious conclusion to jump to is that these were provision for Belfast and Londonderry/Derry in case of Northern Ireland being ceded to the RoI. Is there any evidence for this, or is it just a coincidence? 82.36.26.229 00:32, 28 February 2007 (UTC)