[bubblegun]

Here is the Openreach data for that number:

Telephone Number 01292521613 on Exchange ANNBANK is served by Cabinet 2

Exchange Code:    WSANK        Postcode:    KA6 5HB

Available Products RAG Exchange Status Reason Code Capacity Date Downstream Line Rate(Mbps) Upstream Line Rate(Mbps) Line Range in Mbps
WBC FTTP - Not planned - - - - -
WBC FTTC - - - - - - -
WBC - Not planned - - - - -
WBC(Annex-M) - - - - - - -
WBC Fixed Rate Amber Not planned L - - - -
WBC Rate Adaptive Green Not planned L - - - -
Max Green Enabled L - Up to 2 - 1 - 3.5
Fixed Rate Amber Enabled L - Up to 1 - -
Rate Adaptive Green Enabled L - Up to 1 - -
Other Offerings
FTTP on Demand - - - - - - -
BET - - - - - - -
Copper Multicast - Not planned - - - - -
Fibre Multicast - Not planned - - - - -

Service Information
CP Name: TALKTALK COMMUNICATIONS LTD
CP Contact: 08001313305

Not a very good exchange, not even on 21CN from BT.

Possibly on a leased line?