B

• Bank codes (15 P)
• Barcodes (2 C, 77 P)

C

• Call signs (2 C, 56 P)
• Company identification numbers (14 P)

G

• Geocodes (14 C, 79 P)

I

• International Standard Book Number (1 C, 9 P)

L

• Language identifiers (1 C, 17 P)

N

• Names (26 C, 70 P)
• National identification numbers (3 C, 41 P)
• Network addressing (4 C, 33 P)
• Numbering in sports (1 C, 13 P)

O

• Opus number disambiguation pages (171 P)

P

• Pharmacological classification systems (1 C, 32 P)

S

• Serial numbers (14 P)
• Ship identification numbers (3 C, 10 P)
• Sony product codes (189 P)

T

• Telephone numbers (7 C, 83 P)

U

• Unique identifiers (3 C, 88 P)
• URI schemes (2 C, 35 P)

V

• Vehicle registration plates (3 C, 24 P)

• Identifier

*

• Identifier (computer languages)
• Numbering scheme

A

• Access badge
• Accession number (cultural property)
• Alphanumeric brand name
• Alphanumericals
• Amazon Standard Identification Number
• Archival Resource Key
• Assessor's parcel number
• Authoritative Legal Entity Identifier

B

• Bag tag
• BBC Programme Identifier
• Bibcode
• Book Item and Component Identifier
• Builder's plate

C

• Catalog number (commercial products)
• Catalog number (music)
• Catalogues of classical compositions
• CLABE
• CODEN
• Consortia Advancing Standards in Research Administration Information
• Controlled vocabulary

D

• Danish bicycle VIN-system
• Datacard Group
• DataCite
• DEA number
• Department of Defense Activity Address Code
• Digital Author Identifier
• Digital object identifier
• Disabled parking permit
• Disabled parking permits of the United States
• Domain name
• Drug identification number

E

• E.161
• E.164
• EasyNumber
• EIDR
• Electronic Product Code
• European Case Law Identifier
• European Legislation Identifier
• Export Administration Regulations
• Extensible Resource Identifier

F

• Facility ID
• Federal Stock Number
• File URI scheme
• Financial Instrument Global Identifier
• Find New Zealand Artists
• Fingerprint (computing)
• Fire sign (address)
• Flight number
• Formal Public Identifier

G

• Gemeinsame Körperschaftsdatei
• Geographic number
• Gewässerkennzahl
• Global Location Number
• Global Research Identifier Database
• Global Trade Item Number
• Globally unique identifier

H

• Halo numbers
• Handle System
• Headstamp
• Hostname
• House numbering

I

• I-name
• I-number
• Identicon
• Identifiers.org
• IEEE Registration Authority
• InChIKey
• Info URI scheme
• International Article Number
• International Business Registration Number
• International Chemical Identifier
• International Designator
• International Standard Audiovisual Number
• International Standard Identifier for Libraries and Related Organizations
• International Standard Music Number
• International Standard Musical Work Code
• International Standard Recording Code
• International Traffic in Arms Regulations
• Internet resource locator
• List of group-0 ISBN publisher codes
• List of group-1 ISBN publisher codes
• ISO/IEC 7812

K

• KulturNav

L

• Language code
• Library of Congress Control Number
• License number (East German books)
• List of military headstamps
• List of NATO Supply Classification Groups
• Lollipop sequence numbering
• LSID

M

• Maritime Mobile Service Identity
• Matrix number
• Mission code
• MSISDN

N

• Name tag
• Nameber
• National Codification Bureau
• National drug code
• National Provider Identifier
• NATO Codification System
• NATO Stock Number
• Nominal number
• Network service access point address

O

• Object identifier
• Optional information line
• Opus number
• ORCID
• Organizationally unique identifier
• Oxford Biography Index

P

• Part number
• Payment card number
• Permalink
• Persistent identifier
• Persistent object identifier
• Persistent uniform resource locator
• Personennamendatei
• POSTNET
• Price look-up code
• Private Enterprise Number
• Product Licence Number
• Publisher Item Identifier

R

• Registry of Research Data Repositories
• Reporting mark
• Research Organization Registry
• Ringgold identifier
• Road designation or abbreviation
• Room number
• Route number

S

• S10 (UPU standard)
• Satellite Catalog Number
• Schlagwortnormdatei
• SciCrunch
• Security Identifier
• SELIBR
• Sequence number
• Serial shipping container code
• Service number
• Service number (United States Air Force)
• Service number (United States Armed Forces)
• Service number (United States Army)
• Service number (United States Coast Guard)
• Service number (United States Marine Corps)
• Service number (United States Navy)
• Ship identifier
• Signature mark
• Storey
• Syriaca.org
• System identification number
• System identyfikatorów i nazw miejscowości

T

• Tag URI scheme
• Taggant
• Tax Deduction and Collection Account Number
• Telephone number
• Telephone numbering plan
• Thinglink
• TOID
• Top-level domain
• Tracking number
• Tumbler (Project Xanadu)

U

• Uniform Resource Name
• Uniform title
• Unique Device Identification
• Unique National Role
• Unique physician identification number
• United States Munitions List
• Universal Content Identifier
• Universal Product Code
• Unsponsored top-level domain
• UNSPSC
• URI fragment
• URL

V

• Variable symbol
• Vehicle registration plate
• Virtual International Authority File
• Vital Product Data
• Vocabulary of Army Ordnance Stores

W

• Waterbody number
• Wildenstein Index Number
• World Wide Name
• World Wide Port Name