BT Exchange Information

http://www.samknows.com/broadband/search.php

BT network Service Codes

http://www.telephonesuk.co.uk/network_codes.htm

BT Broadband Availability Checker - Tel Number, Post Code and Address

http://www.dslchecker.bt.com/adsl/ADSLChecker.TelephoneNumberOutput

http://www.dslchecker.bt.com/adsl/ADSLChecker.postcode

http://www.dslchecker.bt.com/adsl/ADSLChecker.address

Tiscalli ADSL Annex.M Checker

https://dslreseller.tiscali-business.co.uk/avail_adsl2plus/

3G Data network APN Settings

http://www.flexispy.com/Mobile%20APN%20Setting%20to%20use%20GPRS.htm