| 112 — The European emergency number | | ec-112 |
| 9-1-1 and E9-1-1 services | | fcc-911 |
| Air Quality Status Report | | eea-air |
| AR6 WGII Chapter 6: Cities, settlements and key infrastructure | | ipcc-urban |
| Australian Department of Health and Aged Care | | au-health |
| Australian Institute of Health and Welfare — MyHospitals | | au-aihw |
| Berlin Brandenburg Airport | | de-ber |
| Berliner Verkehrsbetriebe | | de-bvg |
| Canadian Institute for Health Information | | ca-cihi |
| Changi Airport Group | | sg-changi |
| Civil Aviation Authority | | uk-caa |
| Civil Aviation Authority of New Zealand | | nz-caa |
| Civil Aviation Authority of Singapore | | sg-caas |
| Civil Aviation Safety Authority | | au-casa |
| Copenhagen Airport | | dk-cph |
| Cost of Living Index | | numbeo-cost |
| Department for Transport | | uk-dft |
| Department of Infrastructure, Transport, Regional Development, Communications and the Arts | | au-infrastructure |
| Deutsche Bahn | | de-db |
| Dial 111 — Emergencies | | nz-police-111 |
| DSB | | dk-dsb |
| Emergency services in Canada | | canada-emergency |
| Empowering Urban Energy Transitions | | iea-cities |
| Federal Aviation Administration | | us-faa |
| Federal Ministry for Digital and Transport | | de-bmdv |
| Federal Ministry of Health, Germany | | de-bmg |
| Federal Railroad Administration | | us-fra |
| Find a hospital — NHS | | uk-nhs-find-hospital |
| Greater Toronto Airports Authority | | ca-gtaa |
| GVB — Amsterdam Public Transport | | nl-gvb |
| Haneda Airport (Tokyo International) | | jp-haneda |
| Health Canada | | ca-health |
| Heathrow Airport | | uk-heathrow |
| Hospital Services — Ministry of Health, Singapore | | sg-moh-hospitals |
| Île-de-France Mobilités | | fr-idfm |
| Korean National Police Agency | | korea-police |
| Land Transport Authority | | sg-lta |
| Measuring Digital Development | | itu-connectivity |
| Medicare Care Compare | | us-cms-care-compare |
| Metropolitan Transportation Authority | | us-mta |
| Metroselskabet — Copenhagen Metro | | dk-metroselskabet |
| Ministère de la Santé et de la Prévention | | fr-sante |
| Ministère de la Transition écologique | | fr-ecologie |
| Ministerie van Infrastructuur en Waterstaat | | nl-iw |
| Ministry of Health, Labour and Welfare, Japan | | jp-mhlw |
| Ministry of Health, Singapore | | sg-moh |
| Ministry of Land, Infrastructure, Transport and Tourism | | jp-mlit |
| Narita International Airport | | jp-narita |
| NASA POWER | | nasa-power |
| National Ambient Air Quality Standards | | epa-naaqs |
| National Health Service | | uk-nhs |
| National Police Agency of Japan | | npa-japan |
| Nederlandse Spoorwegen | | nl-ns |
| Network Rail | | uk-networkrail |
| OECD Health Statistics | | oecd-health |
| OpenAQ open air-quality platform | | openaq |
| Paris Aéroport | | fr-paris-aeroport |
| Port Authority of New York and New Jersey | | us-panynj |
| RATP | | fr-ratp |
| RIVM — National Institute for Public Health and the Environment | | nl-rivm |
| Schiphol Group — Amsterdam Airport | | nl-schiphol |
| Singapore Civil Defence Force | | scdf-singapore |
| Singapore Police Force | | spf-singapore |
| SNCF | | fr-sncf |
| Speedtest Global Index | | ookla-speedtest |
| Sundhedsstyrelsen — Danish Health Authority | | dk-sst |
| Sydney Airport | | au-syd |
| Te Whatu Ora — Health New Zealand | | nz-tewhatuora |
| Tokyo Metro | | jp-tokyometro |
| Toronto Transit Commission | | ca-ttc |
| Trafikstyrelsen — Danish Transport Authority | | dk-trafikstyrelsen |
| Transport Canada | | ca-tc |
| Transport for London | | uk-tfl |
| Transport for NSW | | au-tfnsw |
| Triple Zero (000) | | triple-zero-au |
| U.S. Department of Health and Human Services | | us-hhs |
| U.S. Department of Transportation | | us-dot |
| UNODC Data Portal | | unodc-crime |
| US EPA AirData — annual AQI summary | | us-epa-airdata |
| VIA Rail Canada | | ca-via |
| Waka Kotahi NZ Transport Agency | | nz-nzta |
| WHO Global Air Quality Guidelines | | who-air |
| Wikidata | | wikidata |
| Wikimedia Commons | | wikimedia-commons |
| World Cities Report 2024 | | un-habitat |
| World Development Indicators | | world-bank-wdi |
| World Health Organization | | who |