Latest Facebook 521 user agents:

User Agent Platform Device
Mozilla/5.0 (iPhone; CPU iPhone OS 17_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/21D61 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone15,4;FBMD/iPhone;FBSN/iOS;FBSV/17.3.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 17 iPhone 15
Mozilla/5.0 (iPhone; CPU iPhone OS 18_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22E252 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone15,5;FBMD/iPhone;FBSN/iOS;FBSV/18.4.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1];FBNV/1 iOS 18 iPhone 15 Plus
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22B91 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone12,5;FBMD/iPhone;FBSN/iOS;FBSV/18.1.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 18 iPhone 11 Pro Max
Mozilla/5.0 (iPad; CPU OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22F76 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPad11,6;FBMD/iPad;FBSN/iPadOS;FBSV/18.5;FBSS/2;FBID/tablet;FBLC/en_GB;FBOP/5;FBRV/764780440] iPadOS 18 iPad 8 10.2"
Mozilla/5.0 (iPhone; CPU iPhone OS 26_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23E254 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone16,1;FBMD/iPhone;FBSN/iOS;FBSV/26.4.1;FBSS/3;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 15 Pro
Mozilla/5.0 (iPhone; CPU iPhone OS 17_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/21G93 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone12,1;FBMD/iPhone;FBSN/iOS;FBSV/17.6.1;FBSS/2;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/764780440;IABMV/1] iOS 17 iPhone 11
Mozilla/5.0 (iPhone; CPU iPhone OS 15_8_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/19H411 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone9,2;FBMD/iPhone;FBSN/iOS;FBSV/15.8.7;FBSS/3;FBID/phone;FBLC/vi_VN;FBOP/5;FBRV/764780440;IABMV/1] iOS 15 iPhone 7 Plus
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22H352 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone12,1;FBMD/iPhone;FBSN/iOS;FBSV/18.7.8;FBSS/2;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1];FBNV/1 iOS 18 iPhone 11
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22H352 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone12,1;FBMD/iPhone;FBSN/iOS;FBSV/18.7.8;FBSS/2;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 18 iPhone 11
Mozilla/5.0 (iPhone; CPU iPhone OS 26_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23C71 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone18,2;FBMD/iPhone;FBSN/iOS;FBSV/26.2.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 17 Pro Max
Mozilla/5.0 (iPhone; CPU iPhone OS 18_6_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22G100 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone14,7;FBMD/iPhone;FBSN/iOS;FBSV/18.6.2;FBSS/3;FBID/phone;FBLC/es_LA;FBOP/5;FBRV/764780440;IABMV/1];FBNV/1 iOS 18 iPhone 14
Mozilla/5.0 (iPhone; CPU iPhone OS 18_6_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22G100 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone14,7;FBMD/iPhone;FBSN/iOS;FBSV/18.6.2;FBSS/3;FBID/phone;FBLC/es_LA;FBOP/5;FBRV/764780440;IABMV/1] iOS 18 iPhone 14
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22H352 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone14,5;FBMD/iPhone;FBSN/iOS;FBSV/18.7.8;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 18 iPhone 13
Mozilla/5.0 (iPhone; CPU iPhone OS 26_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23E261 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone16,1;FBMD/iPhone;FBSN/iOS;FBSV/26.4.2;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 15 Pro
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22H352 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone14,4;FBMD/iPhone;FBSN/iOS;FBSV/18.7.8;FBSS/3;FBID/phone;FBLC/fr_FR;FBOP/5;FBRV/764780440;IABMV/1] iOS 18 iPhone 13 Mini
Mozilla/5.0 (iPhone; CPU iPhone OS 26_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23E261 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone17,2;FBMD/iPhone;FBSN/iOS;FBSV/26.4.2;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 16 Pro Max
Mozilla/5.0 (iPhone; CPU iPhone OS 26_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23E261 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone14,5;FBMD/iPhone;FBSN/iOS;FBSV/26.4.2;FBSS/3;FBID/phone;FBLC/es_LA;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 13
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7_14 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/20H370 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone10,3;FBMD/iPhone;FBSN/iOS;FBSV/16.7.14;FBSS/3;FBID/phone;FBLC/en_Qaau_US;FBOP/5;FBRV/764780440;IABMV/1];FBNV/1 iOS 16 iPhone X
Mozilla/5.0 (iPhone; CPU iPhone OS 26_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23D8133 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone15,3;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/3;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/764780440;IABMV/1];FBNV/1 iOS 26 iPhone 14 Pro Max
Mozilla/5.0 (iPhone; CPU iPhone OS 26_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23D8133 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone15,3;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/3;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 14 Pro Max