Here's what the DTCC have listed for today 22 April.
USDJPY 109.50 (USD 394m) 112.70 (2.2bln) 112.85 (1.95bln) 113.00 (1.27bln)EURUSD:1.1295-1.1300 (EUR 1.0bln) 1.1400 (1.26bln) GBPUSD: 1.4130 (GBP 297m) 1.4300 (401m)USDCHF 0.9525 (USD 200m) 0.9675 (315m) 0.9785 (335m)EURGBP 0.7865-67 (EUR 1.05bln)AUDUSD: 0.7575 (AUD245m) 0.7650 (737m) 0.7715-20 (216m) 0USDCAD 1.2700 (USD 335m) 1.3100 ( 420m) 1.3125 (592m)AUDNZD 1.0900 (AUD 1.4bln) 1.1100 (1.31bln) 1.1200 (4.61bln) 1.1400 (1.85bln)Large AUDNZD expiries in play and will impact on core pairs.
Remember that these are "vanilla" options so still in play right up to expiry at 14.00 GMT even if breached in the meantime.
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