UK Area Code information for Chelmsford

Chelmsford Area Code Allocation

Ofcom has allocated the 01245 area code to service Chelmsford and the surrounding area on at least 4 exchanges.

The Residential Area of Chelmsford

More about Chelmsford?

Chelmsford comprises postcodes covering roughly 26,181km2 containing 1,972 commercial properties and 47,911 domestic properties.

Chelmsford Exchange Information

Chelmsford EACHE

The Chelmsford exchange has 1,594 commercial and 30,013 domestic properties.
Adsl Max
Wbc Fixed Rate
Wbc Adsl 2+
Wbc Adsl 2+ Annex M
Fixed Rate
Some postcodes covered by this exange include;
CM1 1NP
CM1 1JW
CM1 1EZ
CM1 1LF
CM1 1QT
CM1 1AH
CM1 1RD
CM1 1QU
CM1 1HF
CM1 1NX
CM1 1JS
CM1 1NL
CM1 1NQ
CM1 1NW
CM1 1NY
CM1 1HS
CM1 1NH
CM1 1NT
CM1 1NS
CM1 1FB
CM1 1JR
CM1 1HQ
CM1 1NZ
CM1 1HP
CM1 1UP
CM1 1HL
CM1 1TB
CM1 1UR
CM1 1PJ
CM1 1JP
CM1 1JY
CM1 1JU
CM1 1AS
CM1 1NF
CM1 1QN
CM1 1DW
CM1 1TY
CM1 1LW
CM1 1AT
CM1 1JN
CM1 1FA
CM1 1AY
CM1 1EW
CM1 1HD
CM1 1UY
CM1 1NE
CM1 1YA
CM1 1HT
CM1 1EH
CM1 1LN

Boreham EABOR

The Boreham exchange has 186 commercial and 8,409 domestic properties.
Some postcodes covered by this exange include;
CM2 5LR
CM2 5PG
CM2 5PE
CM2 5EF
CM2 5PW
CM2 5PB
CM2 5PF
CM2 5EZ
CM2 5LA
CM2 5UY
CM2 5LG
CM2 5LB
CM2 5EY
CM2 5PU
CM2 5TA
CM2 5PQ
CM2 5TH
CM1 6GY
CM2 5PJ
CM1 5GY
CM2 5PA
CM2 5PL
CM2 5AS
CM1 5YD
CM1 6YA
CM1 6YD
CM2 5PR
CM1 5QT
CM1 6QT
CM2 5PX
CM1 6YE
CM1 5YE
CM1 6TF
CM1 5TF
CM98 1AZ
CM98 1BA
CM98 1AY
CM1 6QU
CM1 5QU
CM1 6YF
CM1 5YF
CM2 5PD
CM1 6QR
CM1 5QR
CM1 5GZ
CM1 6GZ
CM1 6QS
CM1 5QS
CM1 6YR
CM1 5YR

Broomfield EABMD

The Broomfield exchange has 54 commercial and 3,498 domestic properties.
Some postcodes covered by this exange include;
CM1 5DR
CM1 7DR
CM1 7ZS
CM1 5ZT
CM1 5ZS
CM1 7ZT
CM1 7DT
CM1 5DT
CM1 5DW
CM1 7DW
CM1 5DZ
CM1 7BS
CM1 5BS
CM1 7DZ
CM1 5DP
CM1 5AN
CM1 7AN
CM1 7DP
CM1 5DN
CM1 7DN
CM1 7DS
CM1 5DS
CM1 5AY
CM1 7AY
CM1 5EQ
CM1 5AS
CM1 7AS
CM1 7EQ
CM1 5BA
CM1 7BA
CM1 7DX
CM1 5DL
CM1 5AT
CM1 5DX
CM1 7DU
CM1 7AT
CM1 5DU
CM1 7DL
CM1 5AZ
CM1 7AZ
CM1 5AJ
CM1 7BP
CM1 5DY
CM1 7DY
CM1 7AH
CM1 5BP
CM1 5BD
CM1 7BD
CM1 5AU
CM1 7AU

Great Baddow EAGBD

The Great Baddow exchange has 138 commercial and 5,991 domestic properties.
Adsl Max
Wbc Fixed Rate
Wbc Adsl 2+
Wbc Adsl 2+ Annex M
Fixed Rate
Some postcodes covered by this exange include;
CM2 7JD
CM2 7JE
CM2 7JB
CM2 7JP
CM2 7HY
CM2 7LE
CM2 8JF
CM2 7JA
CM2 7JW
CM2 7LF
CM2 8HS
CM2 7JJ
CM2 7AA
CM2 8HH
CM2 7JQ
CM2 7QZ
CM2 7JF
CM2 7JG
CM2 8HJ
CM2 7QY
CM2 7JL
CM2 7JN
CM2 8JP
CM2 8HP
CM2 7FQ
CM2 7QX
CM2 7JH
CM2 8HG
CM2 8JN
CM2 8HT
CM2 8HQ
CM2 8HU
CM2 7FP
CM2 7HZ
CM2 7HX
CM2 8HR
CM2 7AX
CM2 8HY
CM2 8HL
CM2 8JJ
CM2 8SW
CM4 9TN
CM4 9TW
CM4 9TS
CM2 8JA
CM2 8JW
CM2 7TL
CM2 7AS
CM2 7DA
CM2 7AT

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.

ADSL Max

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.

WBC ADSL 2+

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.