020

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Export map as:

Research this topic

Explore the main themes, entities and connections around 020. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

History

City of London Director Oxford Circus London Heathrow Airport Mnemonic

15 related topics

Coverage

Central London Colindale Croydon Ealing Eltham

33 related topics

Number allocation

National Telephone Numbering Plan BT Ofcom

3 related topics

Overview

National dialling code Linked numbering scheme Trunk prefix Foreign and Commonwealth Office Global Crossing

6 related topics

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Active since: 1 June 1999[notes 1]
Area served: Bushey Heath Chigwell Elstree Ewell London Loughton Thames Ditton
Conservation: No
Earlier code: 01; 071, 081
International calling: +44 20
National calling: 020

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

National dialling code Telephone numbers in the United Kingdom
Linked numbering scheme
Trunk prefix
Foreign and Commonwealth Office
Global Crossing
Tristan da Cunha

History

City of London
Director Director telephone system
Oxford Circus
London Heathrow Airport
Mnemonic
All-figure dialling
Overlaid Overlay plan
STD code
Subscriber trunk dialling
London Docklands
Birds of a Feather Birds of a Feather (TV series)
Mercury Communications
PhONEday
Big Number Change
Widespread misconception UK telephone code misconceptions

Coverage

Number allocation

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Nodes62

Edges61

Triples78

Avg. degree1.97

Density0.032258

Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

020

Top relations

related to Coverage · 23

020 → Borehamwood, Buckhurst Hill, Bushey, Carpenders Park, Chigwell, Communities, Elstree, Essex, Ewell, Greater London, Hertfordshire, London, Loughton, Molesey, Sewardstone, South Oxhey, Surrey, Thames Ditton, The, The City

related to STD code · 19

020 → April, At, Birds, Central, East, Essex-based TV, Exceptionally, Feather, For, In, In May, London, London Docklands, Mercury Communications, PhONEday, The, The STD, This, Until May

related to London telephone area · 18

020 → Because, Before, Bishopgate, Central, City, Director, Holborn, In, London, March, Monday, Monument, November, Saturday, Sloane, The, The Director, Western

related to Number allocation · 9

020 → Big Number Change, BT, In, National Telephone Numbering Plan, Ofcom, The, This, Under, With

Active since · 1

020 → 1 June 1999[notes 1]

Area served · 1

020 → Bushey Heath Chigwell Elstree Ewell London Loughton Thames Ditton

Conservation · 1

020 → No

Earlier code · 1

020 → 01; 071, 081

International calling · 1

020 → +44 20

National calling · 1

020 → 020

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

code london area codes telephone numbers exchange exchanges number within dialling local subscriber greater used system new part numbering also

Entity relationships Subject–Predicate–Object triples

Subject	Predicate	Object	Confidence	Src
020	Active since	1 June 1999[notes 1]	1.00	infobox
020	Area served	Bushey Heath Chigwell Elstree Ewell London Loughton Thames Ditton	1.00	infobox
020	Conservation	No	1.00	infobox
020	Earlier code	01; 071, 081	1.00	infobox
020	International calling	+44 20	1.00	infobox
020	National calling	020	1.00	infobox
020	Number format	020 xxxx xxxx	1.00	infobox
020	Previous code	0171, 0181	1.00	infobox
020	is a	national dialling code for London in the United Kingdom	0.90	text
020	related to Coverage	The	0.60	section
020	related to Coverage	London	0.60	section
020	related to Coverage	The Greater London	0.60	section

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

Connections between topic areas Semantic bridges

Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

Min side: 3