Latest Facebook 504 user agents:

User Agent Platform Device
Mozilla/5.0 (iPhone; CPU iPhone OS 18_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22C152 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPhone17,3;FBMD/iPhone;FBSN/iOS;FBSV/18.2;FBSS/3;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/710721179;IABMV/1] iOS 18 iPhone 16
Mozilla/5.0 (Linux; Android 16; moto g - 2025 Build/W1VK36H.9-12-10; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/146.0.7680.119 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/504.0.0.69.64;] Android 16 Moto G
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/504.0.0.62.85;FBBV/707243085;FBDV/iPhone12,1;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/2;FBID/phone;FBLC/en_Qaau_GB;FBOP/5;FBRV/710721179;IABMV/1] iOS 26 iPhone 11
Mozilla/5.0 (iPhone; CPU iPhone OS 26_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23D127 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPhone15,2;FBMD/iPhone;FBSN/iOS;FBSV/26.3;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/710721179;IABMV/1] iOS 26 iPhone 14 Pro
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/504.0.0.62.85;FBBV/707243085;FBDV/iPhone18,1;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/710721179;IABMV/1] iOS 26 iPhone 17 Pro
Mozilla/5.0 (iPad; CPU OS 26_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23D8133 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPad12,2;FBMD/iPad;FBSN/iPadOS;FBSV/26.3.1;FBSS/2;FBID/tablet;FBLC/de_DE;FBOP/5;FBRV/710721179] iPadOS 26 iPad 9 10.2"
Mozilla/5.0 (iPad; CPU OS 18_6_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22G100 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPad11,6;FBMD/iPad;FBSN/iPadOS;FBSV/18.6.2;FBSS/2;FBID/tablet;FBLC/en_US;FBOP/5;FBRV/710721179] iPadOS 18 iPad 8 10.2"
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7_11 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/20H360 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPhone10,6;FBMD/iPhone;FBSN/iOS;FBSV/16.7.11;FBSS/3;FBID/phone;FBLC/en_GB;FBOP/5;FBRV/710721179;IABMV/1] iOS 16 iPhone X
Mozilla/5.0 (iPad; CPU OS 26_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23D8133 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPad13,18;FBMD/iPad;FBSN/iPadOS;FBSV/26.3.1;FBSS/2;FBID/tablet;FBLC/en_US;FBOP/5;FBRV/710721179];FBNV/1 iPadOS 26 iPad 10 10.9" WiFi
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/504.0.0.62.85;FBBV/707243085;FBDV/iPhone16,2;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/710721179;IABMV/1] iOS 26 iPhone 15 Pro Max
Mozilla/5.0 (iPhone; CPU iPhone OS 15_8_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/19H402 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPhone9,4;FBMD/iPhone;FBSN/iOS;FBSV/15.8.6;FBSS/3;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/710721179;IABMV/1] iOS 15 iPhone 7 Plus
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22B83 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPhone15,2;FBMD/iPhone;FBSN/iOS;FBSV/18.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/710721179;IABMV/1] iOS 18 iPhone 14 Pro
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/504.0.0.62.85;FBBV/707243085;FBDV/iPhone18,3;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/710721179;IABMV/1] iOS 26 iPhone 17
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/504.0.0.62.85;FBBV/707243085;FBDV/iPhone14,5;FBMD/iPhone;FBSN/iOS;FBSV/18.2.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/710721179;IABMV/1] iOS 18 iPhone 13
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22D82 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPhone17,3;FBMD/iPhone;FBSN/iOS;FBSV/18.3.2;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/710721179;IABMV/1] iOS 18 iPhone 16
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/504.0.0.62.85;FBBV/707243085;FBDV/iPhone17,2;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/710721179;IABMV/1] iOS 26 iPhone 16 Pro Max
Mozilla/5.0 (iPhone; CPU iPhone OS 26_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23D127 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPhone17,3;FBMD/iPhone;FBSN/iOS;FBSV/26.3;FBSS/3;FBID/phone;FBLC/en_GB;FBOP/5;FBRV/710721179;IABMV/1] iOS 26 iPhone 16
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/21F90 [FBAN/FBIOS;FBAV/504.0.0.62.85;FBBV/707243085;FBDV/iPhone16,2;FBMD/iPhone;FBSN/iOS;FBSV/17.5.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/710721179;IABMV/1] iOS 17 iPhone 15 Pro Max
Mozilla/5.0 (Linux; Android 12; SM-G973U Build/SP1A.210812.016; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/134.0.6998.92 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/504.0.0.69.64;] Android 12 Galaxy S10
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/504.0.0.62.85;FBBV/707243085;FBDV/iPhone12,1;FBMD/iPhone;FBSN/iOS;FBSV/18.6.2;FBSS/2;FBID/phone;FBLC/en_GB;FBOP/5;FBRV/710721179;IABMV/1] iOS 18 iPhone 11