I saw the following 53 aircraft at DFW on Monday, June 21, 2021:
N120SY ERJ-175-LR (ERJ-170-200 LR) United Express
N126AN A321-231(WL) American Airlines
N142AN A321-231(WL) American Airlines
N148AN A321-231(WL) American Airlines
N151AN A321-231(WL) American Airlines
N152AA A321-231(WL) American Airlines
N202NN ERJ-175-LR (ERJ-170-200 LR) American Eagle
N217NN ERJ-175-LR (ERJ-170-200 LR) American Eagle
N223NN ERJ-175-LR (ERJ-170-200 LR) American Eagle
N230FR A320-214(WL) Frontier Airlines
N234JW ERJ-175-LR (ERJ-170-200 LR) American Eagle
N249NN ERJ-175-LR (ERJ-170-200 LR) American Eagle
N253NN ERJ-175-LR (ERJ-170-200 LR) American Eagle
N262NN ERJ-175-LR (ERJ-170-200 LR) American Eagle
N342PM 737-800(WL) American Airlines
N412UW A321-253NX(WL) American Airlines
N552UW A321-231 American Airlines
N568UW A321-231 American Airlines
N608JB A320-232 JetBlue Airways
N654AW A320-232 American Airlines
N657AW A320-232 American Airlines
N661AW A320-232 American Airlines
N680AE ERJ-145-LR American Eagle
N694AE ERJ-145-LR American Eagle
N711UW A319-112 American Airlines
N719EV CRJ-701-ER American Eagle
N740UW A319-112 American Airlines
N742PS A319-112 American Airlines
N742YX ERJ-175-LR (ERJ-170-200 LR) United Express
N754SK CRJ-701-ER United Express
N774AN 777-223(ER) American Airlines
N776XF A319-111 American Airlines
N822AN 787-9 Dreamliner American Airlines
N829NN 737-823(WL) American Airlines
N832NN 737-823(WL) American Airlines
N866NN 737-823(WL) American Airlines
N875NN 737-823(WL) American Airlines
N885NN 737-823(WL) American Airlines
N894NN 737-823(WL) American Airlines
N899NN 737-823(WL) American Airlines
N910AU A321-231(WL) American Airlines
N914FJ CRJ-900-ER Mesa Airlines
N914UY A321-231 American Airlines
N920FJ CRJ-900-ER Mesa Airlines
N932LR CRJ-900-ER Mesa Airlines
N944LR CRJ-900-ER Mesa Airlines
N946AN 737-823(WL) American Airlines
N959AN 737-823(WL) American Airlines
N968NN 737-823(WL) American Airlines
N973UY A321-231 American Airlines
N976AN 737-823(WL) American Airlines
N992AN 737-823(WL) American Airlines
XA-VAU A320-232(WL) Viva Aerobus