Latest Facebook 521 user agents:

User Agent Platform Device
Mozilla/5.0 (iPhone; CPU iPhone OS 26_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23F77 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone16,1;FBMD/iPhone;FBSN/iOS;FBSV/26.5;FBSS/3;FBID/phone;FBLC/en_GB;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 15 Pro
Mozilla/5.0 (Linux; Android 8.1.0; vivo 1820 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/87.0.4280.141 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/521.0.0.42.97;] Android 8 Y91i
Mozilla/5.0 (Linux; Android 13; CPH2325 Build/TP1A.220905.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.146 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/521.0.0.42.97;IABMV/1;] Android 13 A55
Mozilla/5.0 (Linux; Android 10; SM-A205F; Build/QP1A.190711.020; ) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/129.0.6668.71 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/521.0.0.42.97;] Android 10 Galaxy A20
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/iPhone16,2;FBMD/iPhone;FBSN/iOS;FBSV/18.7.8;FBSS/3;FBID/phone;FBLC/en_Qaau_GB;FBOP/5;FBRV/764780440;IABMV/1] iOS 18 iPhone 15 Pro Max
Mozilla/5.0 (iPhone; CPU iPhone 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/iPhone17,2;FBMD/iPhone;FBSN/iOS;FBSV/18.5;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1];FBNV/1 iOS 18 iPhone 16 Pro Max
Mozilla/5.0 (iPhone; CPU iPhone OS 18_4_1 like Mac OS X; pt_BR) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 FBAN/FBIOS;FBAV/521.0.0.38.74;FBBV/820364511;FBDV/iPhone15,5;FBMD/iPhone;FBSN/iOS;FBSV/18.4.1;FBSS/3;FBID/phone;FBLC/pt_BR;FBOP/5;FBRV/823001544 iOS 18 iPhone 15 Plus
Mozilla/5.0 (iPad; CPU 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/iPad11,6;FBMD/iPad;FBSN/iPadOS;FBSV/18.4.1;FBSS/2;FBID/tablet;FBLC/en_US;FBOP/5;FBRV/764780440] iPadOS 18 iPad 8 10.2"
Mozilla/5.0 (iPhone; CPU iPhone OS 26_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23F77 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone14,2;FBMD/iPhone;FBSN/iOS;FBSV/26.5;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 13 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/iPhone14,5;FBMD/iPhone;FBSN/iOS;FBSV/17.6.1;FBSS/3;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/764780440;IABMV/1] iOS 17 iPhone 13
Mozilla/5.0 (iPhone; CPU iPhone OS 26_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23F81 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone18,2;FBMD/iPhone;FBSN/iOS;FBSV/26.5.1;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 26_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23C55 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone15,4;FBMD/iPhone;FBSN/iOS;FBSV/26.2;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 15
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22D72 FBAN/FBIOS;FBAV/521.0.0.35.102;FBBV/734681295;FBDV/iPhone15,5;FBMD/iPhone;FBSN/iOS;FBSV/18.3.1;FBSS/3;FBID/phone;FBLC/pt_BR;FBOP/5 iOS 18 iPhone 15 Plus
Mozilla/5.0 (iPad; CPU 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/iPad15,3;FBMD/iPad;FBSN/iPadOS;FBSV/18.4.1;FBSS/2;FBID/tablet;FBLC/en_US;FBOP/5;FBRV/764780440] iPadOS 18 iPad Air 7 11" WiFi
Mozilla/5.0 (iPhone; CPU iPhone OS 18_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22C161 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone15,4;FBMD/iPhone;FBSN/iOS;FBSV/18.2.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 18 iPhone 15
Mozilla/5.0 (iPhone; CPU iPhone 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/iPhone14,6;FBMD/iPhone;FBSN/iOS;FBSV/18.5;FBSS/2;FBID/phone;FBLC/fr_FR;FBOP/5;FBRV/764780440;IABMV/1];FBNV/1 iOS 18 iPhone SE (2022)
Mozilla/5.0 (iPhone; CPU iPhone OS 26_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23F77 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone15,4;FBMD/iPhone;FBSN/iOS;FBSV/26.5;FBSS/3;FBID/phone;FBLC/zh_Qaau_CN;FBOP/5;FBRV/764780440;IABMV/1] iOS 26 iPhone 15
Mozilla/5.0 (iPhone; CPU iPhone OS 18_0_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22A3370 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone14,5;FBMD/iPhone;FBSN/iOS;FBSV/18.0.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 18 iPhone 13
Mozilla/5.0 (iPhone; CPU iPhone OS 15_8_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/19H394 [FBAN/FBIOS;FBAV/521.0.0.38.98;FBBV/760232234;FBDV/iPhone9,2;FBMD/iPhone;FBSN/iOS;FBSV/15.8.5;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/764780440;IABMV/1] iOS 15 iPhone 7 Plus
Mozilla/5.0 (iPhone; CPU iPhone 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/iPhone17,4;FBMD/iPhone;FBSN/iOS;FBSV/18.5;FBSS/3;FBID/phone;FBLC/en_GB;FBOP/5;FBRV/764780440;IABMV/1] iOS 18 iPhone 16 Plus