Property talk:P2900

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fax number
telephone number of a facsimile line

Represents	fax number (Q125183827)
Data type	String
Domain	organization (Q43229), human (Q5), facility (Q13226383) or administrative territorial entity (Q56061)
Allowed values	(?:(?:\+|00|011)[\.\/\-\ \t]*([17]|2(?:[07]|[1-689]\d)|3(?:[0-4679]|[578]\d)|4(?:[013-9]|2\d)|5(?:[1-8]|[09]\d)|6(?:[0-6]|[789]\d)|8(?:[1246]|[035789]\d)|9(?:[0-58]|[679]\d))[\.\/\-\ \t]*|([17])[\.\/\-\ ])?(?:\((\d{1,6})\)[\.\/\-\ \t]*)?(?:(\d{1,6})[\.\/\-\ ])?(?:(\d{1,6})[\.\/\-\ ])?(?:(\d{1,6})[\.\/\-\ ])?(?:(\d{1,6})[\.\/\-\ ])?(\d{0,10}?)(\d{1,4})(?:[\.\/\-;\ \t]*e?xt?[\.\/\-=\ \t]*(\d{1,14}))? (single phone number including country code; add separate properties if you need multiple phone numbers)
Example	Maison de Victor Hugo (Q2599177) → +33-1-42-72-06-64 Rijksmuseum (Q190804) → +31-20-6747001
Format and edit filter validation	Abuse filter #89
Formatter URL	tel:$1
See also	phone number (P1329)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Map of people by place values: place of birth educated at work location residence place of death place of burial January 1st dates People with date of birth on January 1 People with date of death on January 1 People with both dates on January 1 Database reports/Complex constraint violations/P2900 Database reports/Constraint violations/P2900 Map Random list
Living people protection class	property that may violate privacy (Q44601380)
Proposal discussion	Proposal discussion
Current uses	Total 64,686 Main statement 64,657 >99.9% of uses Qualifier 28 <0.1% of uses Reference 1 <0.1% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Format “(?:(?:\+|00|011)[\.\/\-\ \t]*([17]|2(?:[07]|[1-689]\d)|3(?:[0-4679]|[578]\d)|4(?:[013-9]|2\d)|5(?:[1-8]|[09]\d)|6(?:[0-6]|[789]\d)|8(?:[1246]|[035789]\d)|9(?:[0-58]|[679]\d))[\.\/\-\ \t]*|([17])[\.\/\-\ ])?(?:\((\d{1,6})\)[\.\/\-\ \t]*)?(?:(\d{1,6})[\.\/\-\ ])?(?:(\d{1,6})[\.\/\-\ ])?(?:(\d{1,6})[\.\/\-\ ])?(?:(\d{1,6})[\.\/\-\ ])?(\d{0,10}?)(\d{1,4})(?:[\.\/\-;\ \t]*e?xt?[\.\/\-=\ \t]*(\d{1,14}))?”: value must be formatted using this pattern (PCRE syntax). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P2900#Format, SPARQL

Item “phone number (P1329)”: Items with this property should also have “phone number (P1329)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P2900#Item P1329, search, SPARQL

Citation needed: the property must have at least one reference (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P2900#citation needed

Type “organization (Q43229), human (Q5), facility (Q13226383), administrative territorial entity (Q56061)”: item must contain property “instance of (P31), subclass of (P279)” with classes “organization (Q43229), human (Q5), facility (Q13226383), administrative territorial entity (Q56061)” or their subclasses (defined using subclass of (P279)). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P2900#Type Q43229, Q5, Q13226383, Q56061, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P2900#Entity types

Scope is as main value (Q54828448): the property must be used by specified way only (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P2900#Scope, SPARQL

Qualifiers “point in time (P585), start time (P580), end time (P582), has use (P366), valid in place (P3005), applies to part (P518), applies to people (P6001), reason for deprecated rank (P2241), reason for preferred rank (P7452), earliest date (P1319), latest start date (P8555), earliest end date (P8554), latest date (P1326)”: this property should be used only with the listed qualifiers. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P2900#allowed qualifiers, SPARQL

Check for country code
Entries should start with "+" and the country code (+1 for US numbers) (Help)
Violations query: SELECT ?item ?itemLabel ?value WHERE { ?item wdt:P2900 ?value . ?item wdt:P17/wdt:P474 ?cc . FILTER(!strstarts(?value, ?cc)) . SERVICE wikibase:label { bd:serviceParam wikibase:language "en" } } LIMIT 1000
List of this constraint violations: Database reports/Complex constraint violations/P2900#Check for country code

This property is being used by: voy:it:Template:Listing/Wikidata voy:Template:Listing, voy:Wikivoyage:Listings Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Is the "phone number" restriction necessary?

>Item “phone number (P1329)”: Items with this property should also have “phone number (P1329)”.

I'm wondering what is the motivation behind this restriction. Surely an entity (organization, person) can have a fax number without a phone number. I'm going through an old computer magazine, and some companies have published their fax number but no phone number. I suggest this restriction be removed. --Sanqui (talk) 14:28, 19 August 2023 (UTC)