As of 2022-03-07, the Wikidata property Central Index Key (P5531) is used on 1,997 items as main value on statements (not counting qualifiers) of the Q and P namespaces.

Closest properties: by cardinality of intersection, by Jaccard index.

Display properties of the following types:                                    

Closest properties by cardinality of intersection

IDLabelIntersection cardinalityJaccard index
P646 Freebase ID 1,468
 0.0003
P2088 Crunchbase organization ID 1,465
 0.0792
P2002 Twitter username 1,089
 0.0035
P2013 Facebook ID 809
 0.0035
P2427 GRID ID 723
 0.0069
P6782 ROR ID 721
 0.0069
P3417 Quora topic ID 690
 0.0037
P946 ISIN 672
 0.0993
P1278 Legal Entity Identifier 659
 0.0214
P3347 PermID 653
 0.0956
P213 ISNI 612
 0.0004
P2003 Instagram username 579
 0.0037
P214 VIAF ID 501
 0.0002
P7859 WorldCat Identities ID 470
 0.0003
P2397 YouTube channel ID 434
 0.0064
P244 Library of Congress authority ID 405
 0.0003
P3500 Ringgold ID 391
 0.0041
P6366 Microsoft Academic ID 373
 0.0014
P3377 Bloomberg company ID 368
 0.1269
P2671 Google Knowledge Graph ID 281
 0.0000
P4264 LinkedIn company ID 274
 0.0230
P3153 Crossref funder ID 224
 0.0128
P8253 OSM Name Suggestion Index identifier 200
 0.0148
P3393 LittleSis organization ID 192
 0.0369
P10206 Comparably company ID 154
 0.0675
P1417 Encyclopædia Britannica Online ID 154
 0.0009
P1320 OpenCorporates ID 133
 0.0030
P3836 Pinterest username 132
 0.0208
P227 GND ID 132
 0.0001
P10283 OpenAlex ID 120
 0.0012
P4527 UK Parliament thesaurus ID 119
 0.0043
P3553 Zhihu topic ID 113
 0.0070
P2627 ISO 9362 SWIFT/BIC code 110
 0.0284
P7306 Downdetector ID 104
 0.0386
P8060 Glassdoor company ID 103
 0.0426
P8189 National Library of Israel J9U ID 101
 0.0006
P7502 Golden ID 98
 0.0252
P2657 EU Transparency Register ID 96
 0.0189
P691 NKCR AUT ID 94
 0.0002
P1297 IRS Employer Identification Number 87
 0.0063
P3984 subreddit 63
 0.0048
P2037 GitHub username 62
 0.0065
P2847 Google+ ID 61
 0.0077
P10285 Indeed company ID 57
 0.0269
P4839 Wolfram Language entity code 56
 0.0003
P4342 Store norske leksikon ID 54
 0.0007
P268 Bibliothèque nationale de France ID 54
 0.0001
P2581 BabelNet ID 53
 0.0007
P269 IdRef ID 52
 0.0001
P6262 Fandom article ID 49
 0.0010

Closest properties by Jaccard index

IDLabelIntersection cardinalityJaccard index
P3377 Bloomberg company ID 368
 0.1269
P946 ISIN 672
 0.0993
P3347 PermID 653
 0.0956
P2088 Crunchbase organization ID 1,465
 0.0792
P10206 Comparably company ID 154
 0.0675
P8060 Glassdoor company ID 103
 0.0426
P7306 Downdetector ID 104
 0.0386
P3393 LittleSis organization ID 192
 0.0369
P2627 ISO 9362 SWIFT/BIC code 110
 0.0284
P10285 Indeed company ID 57
 0.0269
P7502 Golden ID 98
 0.0252
P4264 LinkedIn company ID 274
 0.0230
P1278 Legal Entity Identifier 659
 0.0214
P3836 Pinterest username 132
 0.0208
P2657 EU Transparency Register ID 96
 0.0189
P3797 autonomous system number 36
 0.0156
P10146 Levels.fyi company ID 30
 0.0149
P8253 OSM Name Suggestion Index identifier 200
 0.0148
P3153 Crossref funder ID 224
 0.0128
P4013 Giphy username 46
 0.0117
P3875 Justia Patents company ID 22
 0.0109
P1167 USB vendor ID 24
 0.0108
P5260 App Store developer ID 26
 0.0106
P3221 New York Times topic ID 45
 0.0101
P6160 BoardGameGeek game publisher ID 24
 0.0097
P6422 ManualsLib brand ID 20
 0.0095
P10068 SEEK company ID 21
 0.0088
P4691 OpenSecrets organization ID 17
 0.0082
P9368 CNA topic ID 19
 0.0081
P6182 GameFAQs company ID 25
 0.0078
P2847 Google+ ID 61
 0.0077
P3743 ITU/ISO/IEC object identifier 28
 0.0075
P2771 D-U-N-S number 16
 0.0073
P8939 Google Play developer slug 15
 0.0072
P3553 Zhihu topic ID 113
 0.0070
P4773 MobyGames company ID 36
 0.0070
P6782 ROR ID 721
 0.0069
P2427 GRID ID 723
 0.0069
P2037 GitHub username 62
 0.0065
P2397 YouTube channel ID 434
 0.0064
P1297 IRS Employer Identification Number 87
 0.0063
P9100 GitHub topic 25
 0.0056
P9618 AlternativeTo software ID 17
 0.0056
P3861 App Store app ID 23
 0.0056
P5161 Trustpilot company ID 14
 0.0055
P9402 GameSpot developer ID 12
 0.0055
P5574 CAGE code 11
 0.0053
P3418 Google Play Store app ID 22
 0.0053
P3984 subreddit 63
 0.0048
P7560 UVL company ID 12
 0.0048