The mapping below uses MaxMind's GeoIP2 web service response schema (Country, City, Insights, Enterprise, plus the standalone Anonymous IP, Connection Type, ISP and Domain databases). Nested fields are written in dot notation (location.latitude) to match MaxMind's documentation.

Where a mapping is approximate, the Notes column calls it out. Where no equivalent exists, the cell is blank.

Continent, country, registered/represented country🔗

MaxMind field	51Degrees property	Notes
`continent.code`	`ContinentCode2`
`continent.names.{locale}`	`ContinentName`	51Degrees returns the English name; localized names are not exposed as separate properties.
`continent.geoname_id`	`ContinentGeoNameId`
`country.iso_code`	`CountryCode`	Use `CountryCode3` for ISO 3166-1 alpha-3.
`country.names.{locale}`	`Country`
`country.is_in_european_union`	`IsEu`
`country.confidence`	`LocationConfidence`	MaxMind exposes confidence per geographic level (country, city, subdivision, postal); 51Degrees rolls them up into a single string-valued `LocationConfidence`. See the note below the City/postal/location table.
`country.geoname_id`	`CountryGeoNameId`
`registered_country.iso_code`	`RegisteredCountry`
`registered_country.names.{locale}`	`RegisteredCountry`	Approximate. `RegisteredCountry` is the country's two-letter code, not its name. Look the name up from `RegisteredCountryGeoNameId`, the country's GeoNames identifier.
`registered_country.geoname_id`	`RegisteredCountryGeoNameId`
`represented_country.*`		51Degrees does not separately model represented country (US military bases etc.).

Subdivision (state / region)🔗

MaxMind field	51Degrees property	Notes
`subdivisions[0].iso_code`	`Iso31662Lvl4SubdivisionOnly`	Use `Iso31662Lvl4` for the `CC-SUB` form.
`subdivisions[0].names.{locale}`	`State` or `Region`	`State` for the higher-level subdivision (US states, UK countries); `Region` for the next level down.
`subdivisions[0].confidence`	`LocationConfidence`	See the note below the City/postal/location table.
`subdivisions[0].geoname_id`	`StateGeoNameId`	Use `StateGeoNameIdsGeographical` for every first-level subdivision that the location's area overlaps, weighted by its share of that area.
`subdivisions[1].names.{locale}`	`County`	Approximate. MaxMind lists subdivisions from largest to smallest, and a second one, where MaxMind returns it, is nearest to the second-level administrative area that 51Degrees returns as `County`.
`subdivisions[1].geoname_id`	`CountyGeoNameId`	Approximate, as for the name.

City, postal, location🔗

MaxMind field	51Degrees property	Notes
`city.names.{locale}`	`Town`
`city.confidence`	`LocationConfidence`	See the note below this table.
`city.geoname_id`	`TownGeoNameId`	51Degrees gives the town or populated place nearest the location.
`postal.code`	`ZipCode`
`postal.confidence`	`LocationConfidence`	See the note below this table.
`location.latitude`	`Latitude`	51Degrees returns a single averaged value. See coordinate randomization note below.
`location.longitude`	`Longitude`	51Degrees returns a single averaged value. See coordinate randomization note below.
`location.accuracy_radius`	`AccuracyRadiusMin`	51Degrees recommends `AccuracyRadiusMin` when comparing with other solutions. `AccuracyRadiusMax` is the radius of the circle that covers the whole area. See the `LocationConfidence` note below for the categorical confidence signal that complements these radii.
`location.time_zone`	`TimeZoneIana`	`TimeZoneOffset` gives UTC offset separately.
`location.metro_code`		Deprecated by MaxMind; no 51Degrees equivalent.
`location.average_income`		No equivalent.
`location.population_density`		No equivalent.

Coordinate randomization: 51Degrees randomizes Latitude and Longitude within around 1 km of the true average location for the IP range. The randomization is applied during data file generation, so the value returned for a given IP address is stable across all lookups against the same data file and only changes when a new data file is published. No other property is affected. See Randomization.

Location confidence: 51Degrees rolls up location certainty into a single string-valued LocationConfidence property covering the town and country. Where MaxMind exposes a numeric *.confidence score on each geographic level (country.confidence, city.confidence, subdivisions[0].confidence, postal.confidence), the categorical 51Degrees equivalent is LocationConfidence, complemented by the numeric AccuracyRadiusMax and AccuracyRadiusMin properties for spatial precision. See the property dictionary for the set of possible values.

Traits (network and ASN)🔗

MaxMind field	51Degrees property	Notes
`traits.ip_address`	`Ip` / `IpV6`
`traits.network`	`IpRangeStart` + `IpRangeEnd`	MaxMind returns CIDR; 51Degrees returns explicit start and end addresses.
`traits.autonomous_system_number`	`Asn`
`traits.autonomous_system_organization`	`AsnName`
`traits.isp`	`AsnName`	51Degrees does not separate ISP from AS organization.
`traits.organization`	`RegisteredOwner`
`traits.domain`		No equivalent.
`traits.connection_type`	`ConnectionType`	Approximate. MaxMind returns `Cable/DSL`, `Cellular`, `Corporate`, or `Satellite`. 51Degrees returns `Broadband`, `Cellular`, or `Hosting & Anonymous`, where `Broadband` covers DSL, cable, fiber, and satellite, and there is no corporate category. `IsBroadband`, `IsCellular`, and `IsHosted` give the same information as booleans.
`traits.mobile_country_code`	`Mcc`
`traits.mobile_network_code`		Not exposed as a separate property.
`traits.is_anycast`		No equivalent.
`traits.user_type`		Approximate via `ConnectionType` plus `IsCellular` / `IsHosted`; no business / college / school classification.
`traits.user_count`		No equivalent.
`traits.static_ip_score`		No equivalent.
`traits.ip_risk_snapshot`		Differs in semantics. `HumanProbability` is the closest signal. It returns confidence from 0 to 10 that traffic is from a human rather than hosting or automated infrastructure.

Anonymizer (VPN, proxy, Tor, and hosting)🔗

MaxMind field	51Degrees property	Notes
`anonymizer.is_anonymous`	`IsVPN` \| `IsProxy` \| `IsTor`	MaxMind's umbrella flag; 51Degrees exposes each anonymizer type separately.
`anonymizer.is_anonymous_vpn`	`IsVPN`
`anonymizer.is_hosting_provider`	`IsHosted`
`anonymizer.is_public_proxy`	`IsProxy`
`anonymizer.is_residential_proxy`	`IsProxy`	51Degrees does not distinguish residential proxies from public proxies.
`anonymizer.is_tor_exit_node`	`IsTor`
`anonymizer.confidence`
`anonymizer.network_last_seen`
`anonymizer.provider_name`

Properties unique to 51Degrees🔗

These additional properties describe IP ranges and location weighting, or support crawler detection.

Diversity scores: BrowserDiversity, HardwareDiversity, PlatformDiversity quantify how varied the traffic from an IP range is. See Diversity.
Finer places: Suburb, and Iso31662Lvl8 and Iso31662Lvl8SubdivisionOnly, the ISO 3166-2 code of the OpenStreetMap level 8 area the location is in.
Area polygon: Areas returns the area the IP range is likely to be in as a WKT string, trimmed to the land of the location's country so it does not reach into a neighboring country or over the sea.
Country information: CurrencyCode (ISO 4217), DialCode (the ITU telephone country code) and LanguageCode (ISO 639).
Network: RegisteredName is the name of the IP range, which is usually its owner, and IsPublicRouter says whether the address belongs to a public router.
Bot identification, from Device Detection: IsCrawler, IsArtificialIntelligence, CrawlerName, CrawlerProductTokens, CrawlerUrl, CrawlerUsage.
Human probability: HumanProbability returns a score from 0 to 10. See Human.
Probabilistic identifiers, from 51Did: IdProbGlobal, IdProbLic.