UK Area Code information for Callander

Callander Area Code Allocation

Ofcom has allocated the 01877 area code to service Callander and the surrounding area on at least 1 exchange.

Callander Exchange Information

Callander ESCLR

The Callander exchange has 130 commercial and 1,564 domestic properties.
Some postcodes covered by this exange include;
FK17 8NN
FK17 8WA
FK17 8WB
FK17 8YT
FK17 8ZR
FK17 8YR
FK17 8YS
FK17 8YJ
FK17 8YN
FK17 8YP
FK17 8YL
FK17 8WE
FK17 8WT
FK17 8WX
FK17 8YF
FK17 8WU
FK17 8WF
FK17 8WR
FK18 8WX
FK17 8DT
FK17 8WD
FK17 8ZU
FK17 8AN
FK17 8BB
FK17 8DU
FK17 8JB
FK17 8EX
FK17 8BA
FK17 8AA
FK17 8DB
FK17 8EA
FK17 8BE
FK17 8AR
FK17 8DZ
FK17 8DY
FK17 8AX
FK17 8BL
FK17 8ED
FK17 8AF
FK17 8EB
FK17 8DX
FK17 8BD
FK17 8AH
FK17 8EL
FK17 8AQ
FK17 8EW
FK17 8AB
FK17 8EE
FK17 8BN
FK17 8AE

Broadband Connectivity Type Definitions

Different telephone exchanges have different broadband connectivity depending on their geographic location, the consumers they serve (demand and composition of those consumers) and the competative landscape in that locale. As a result there is a mix of services and related performance which BT classify as follows;

Fixed Rate

There for three fixed rate lines; 512Kbps, 1Mbps and 2Mbps. As with IPStream 500, 1000 and 2000, these have an upstream capped at 288Kbps. Note that all of the other WBC products apart from these are strictly rate adaptive (like ADSL Max).

WBC Fixed Rate

Wholesale Broadband Connect (WBC) offers high-speed, high-performance broadband services.


BT's original ADSL2+ wholesale product with an option of an upstream cap at 448Kbps or no cap at all. ADSL2+ can achieve up to 1Mbps upstream.


ADSL2+ (also known as 21CN (21st Century Network) and WBC (Wholesale Broadband Connect) is a high speed broadband service which offers download speeds of up to 24Mbs and upload speeds of up to 1Mbs.

WBC ADSL 2+ Annex M

ADSL2+ Annex M offers up to 2.5Mbps upstream in the UK. This product is used by many businesses who could previously only find this level of upstream bandwidth with SDSL. Note that there is no option for a capped upstream with this product.

FTTC Range A (Clean)

FTTC Range A is a range where the circuits are deemed to be free of any copper line faults, and any local wiring issues (in a customer's premises). This range is often very wide for both upload and download, and does beg the question of why a copper line fault may exist without being fixed.

FTTC Range B (Impacted)

FTTC Range B is a range where circuits may have copper faults and/or internal wiring issues at a customer's site. The term impacted could be useful, as sometimes crosstalk is mentioned as something that impacts on line speeds, but there is no official word from BT on whether either Range A or Range B take into account the effects of crosstalk.

FTTP On Demand

Fiber to the home (FTTH), also called "fiber to the premises" (FTTP), is the installation and use of optical fiber from a central point directly to individual buildings such as residences, apartment buildings and businesses to provide unprecedented high-speed Internet access. FTTH dramatically increases the connection speeds available to computer users compared with technologies now used in most places.