Well thank you for the wealth of basic information. 

Please read the instructions which asks that you provide the information so we don't have to do some basic spadework.

Firstly, what is the address?

Answer: Courtesy of Yell.com:
DHL Express (UK) Ltd
Block 5,Unit 1, Tweedbank Industrial Estate, Galashiels, Selkirkshire TD1 3RS

192.com yields nothing except the fax which is 01896 751 506. You could try nearby numbers, although Googling reveals 751502 and 500 to be (different) carpet retailers!

What is the telephone dialling code that this address resides in?

Answer: 01896

DHL took over Securicor Omega Logistics, so if they [DHL] continued to operate the old SOL depots, then they may be listed under the SOL name.

Indeed, a Google of "securicor omega express" 01896 reveals this page that shows SOL at that address with the number 01896 751413.

Please come back and let us know whether it works.

.................. which is listed in the unverified database. Did you look?