Latest Facebook 503 user agents:

User Agent Platform Device
Mozilla/5.0 (iPhone; CPU iPhone OS 26_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23E246 [FBAN/FBIOS;FBAV/503.0.0.56.104;FBBV/704769221;FBDV/iPhone15,3;FBMD/iPhone;FBSN/iOS;FBSV/26.4;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 26 iPhone 14 Pro Max
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22H124 [FBAN/FBIOS;FBAV/503.0.0.56.104;FBBV/704769221;FBDV/iPhone15,3;FBMD/iPhone;FBSN/iOS;FBSV/18.7.2;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 18 iPhone 14 Pro Max
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone12,1;FBMD/iPhone;FBSN/iOS;FBSV/17.6.1;FBSS/2;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1];FBNV/1 iOS 17 iPhone 11
Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/21A327 [FBAN/FBIOS;FBAV/503.0.0.56.104;FBBV/704769221;FBDV/iPhone15,4;FBMD/iPhone;FBSN/iOS;FBSV/17.0;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 17 iPhone 15
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7_15 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/20H380 [FBAN/FBIOS;FBAV/503.0.0.56.104;FBBV/704769221;FBDV/iPhone10,3;FBMD/iPhone;FBSN/iOS;FBSV/16.7.15;FBSS/3;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/708854960;IABMV/1] iOS 16 iPhone X
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone14,2;FBMD/iPhone;FBSN/iOS;FBSV/26.3;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 26 iPhone 13 Pro
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone12,3;FBMD/iPhone;FBSN/iOS;FBSV/18.6.2;FBSS/3;FBID/phone;FBLC/tr_TR;FBOP/5;FBRV/708854960;IABMV/1] iOS 18 iPhone 11 Pro
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone12,1;FBMD/iPhone;FBSN/iOS;FBSV/18.3.1;FBSS/2;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 18 iPhone 11
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone17,4;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708895758;IABMV/1] iOS 26 iPhone 16 Plus
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone14,6;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/2;FBID/phone;FBLC/en_GB;FBOP/5;FBRV/708854960;IABMV/1] iOS 26 iPhone SE (2022)
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone8,1;FBMD/iPhone;FBSN/iOS;FBSV/15.8.7;FBSS/2;FBID/phone;FBLC/en_GB;FBOP/5;FBRV/708854960;IABMV/1] iOS 15 iPhone 6s
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone15,5;FBMD/iPhone;FBSN/iOS;FBSV/18.1.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 18 iPhone 15 Plus
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22D63 [FBAN/FBIOS;FBAV/503.0.0.56.104;FBBV/704769221;FBDV/iPhone14,7;FBMD/iPhone;FBSN/iOS;FBSV/18.3;FBSS/3;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/708854960;IABMV/1] iOS 18 iPhone 14
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone17,3;FBMD/iPhone;FBSN/iOS;FBSV/18.5;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 18 iPhone 16
Mozilla/5.0 (iPhone; CPU iPhone OS 26_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23A341 [FBAN/FBIOS;FBAV/503.0.0.56.104;FBBV/704769221;FBDV/iPhone17,2;FBMD/iPhone;FBSN/iOS;FBSV/26.0;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 26 iPhone 16 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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone17,4;FBMD/iPhone;FBSN/iOS;FBSV/26.3.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 26 iPhone 16 Plus
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone17,4;FBMD/iPhone;FBSN/iOS;FBSV/26.2;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 26 iPhone 16 Plus
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone15,3;FBMD/iPhone;FBSN/iOS;FBSV/26.2;FBSS/3;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/708895758;IABMV/1] iOS 26 iPhone 14 Pro Max
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone12,8;FBMD/iPhone;FBSN/iOS;FBSV/18.3.2;FBSS/2;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 18 iPhone SE (2020)
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/503.0.0.56.104;FBBV/704769221;FBDV/iPhone14,5;FBMD/iPhone;FBSN/iOS;FBSV/26.3;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/708854960;IABMV/1] iOS 26 iPhone 13