Block

196091
00000000000005b94c9afac73cd4f3f4ed5595c832e13b6cca21e3828ee3d73c
Transactions 455
Height 196091
Confirmations 697598
Timestamp 4632 days 6 hours ago
Size (bytes) 210729
Version 1
Merkle Root ed48949a910709c0f64b3b15bcef503ec40bc5ad3d6b353b16f69da017c02d17
Nonce 00000000000000000000000000000000000000000000000000000000de57def0
Bits 1a06dfbe
Difficulty 2440642.606915963

Transactions

1fcaf015c99bdf983b5f929274430e2e6de86ec0a2df72816b716ce85365e6d1
mined 4632 days 6 hours ago
No Inputs (Newly Generated Coins)
 
GLNbaZtL6Di7XpxGN26wZ4zo7LYE6GqbQY 50.45507500 BTG924.84 CZK924.84 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 50.45507500 BTG924.84 CZK924.84 CZK
df07dcd9c87613eda8c87573d914da304d2f5a05e80dbf77d2ebca2e0091d0eb
mined 4632 days 6 hours ago
GJeGiDosp3MB5nnyNDZVep7hEqwr218mSe 182.00000000 BTG3336.06 CZK3336.06 CZK
GJeGiDosp3MB5nnyNDZVep7hEqwr218mSe 100.00000000 BTG1833.00 CZK1833.00 CZK
GJeGiDosp3MB5nnyNDZVep7hEqwr218mSe 100.00000000 BTG1833.00 CZK1833.00 CZK
GJeGiDosp3MB5nnyNDZVep7hEqwr218mSe 22.47570000 BTG411.98 CZK411.98 CZK
 
GJ8ESyvBzmiDtKm8JbHgTKCE5hHzEzfWZt 4.47570000 BTG82.04 CZK82.04 CZK→
GJdET1zbwQAicuhiZS8EFFuh7K6a41J34E 400.00000000 BTG7332.00 CZK7332.00 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 404.47570000 BTG7414.04 CZK7414.04 CZK
46739ce6967424488a9720b759e1c7ac0560b5ed35a69e067a3a476fd4ad5ad8
mined 4632 days 6 hours ago
GYoGbY3XjTBbqrQk5rXvJfhgNHBnrqJV71 33060.22267600 BTG605993.88 CZK605993.88 CZK
 
Ge1fZP7PRTGj33KKYdquLF2qW9x6qd9sxq 33058.99244600 BTG605971.33 CZK605971.33 CZK→
GPqq9X9NDFURZRar9A3n2n24z7Hy5BPDtL 1.23023000 BTG22.55 CZK22.55 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 33060.22267600 BTG605993.88 CZK605993.88 CZK
d004e136148d26c084a311d384fde01add8e305af7343dbbd627e195199315c9
mined 4632 days 6 hours ago
GVVFskozeTfUxNqeNMynueC67JnEcEVV7T 409.75260000 BTG7510.77 CZK7510.77 CZK
 
GJeUYAuPUcMm7qnkts5aw79mh5qHHuvui6 214.88988964 BTG3938.93 CZK3938.93 CZK→
GSkobyjFBkXzujZnAyKVKeWRexhXmKXp3b 194.86271036 BTG3571.83 CZK3571.83 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 409.75260000 BTG7510.77 CZK7510.77 CZK
803a6b2f3c0ce3dae38ae196e1c14c68f38399b8b8c302e4c6e7141a49517d31
mined 4632 days 6 hours ago
GMai2HX6hiwNQhQPYbNdpJ5k4XuZG7AdwV 50.27125009 BTG921.47 CZK921.47 CZK
 
GVvCXPTVJagbhy2Xtj9kVCUvZpAKokZ2TR 49.94911296 BTG915.57 CZK915.57 CZK→
GLpMEXdWtqCUYjjNccvKvDu7Sx15iCHWYk 0.32213713 BTG5.90 CZK5.90 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 50.27125009 BTG921.47 CZK921.47 CZK
7b93ed97f35fd5cb2d32ba4a3520353cc25740a28499d9257b333b49e62aaa74
mined 4632 days 6 hours ago
GTUU5DBVsg8NTYtrVeDKhMjRNxf1d9uT8d 6.82220000 BTG125.05 CZK125.05 CZK
GWGRaS79jFmxGC2rrhhrm8HaG53EDm5oDs 0.68656533 BTG12.58 CZK12.58 CZK
 
Ge4DMKEkdD8oDoNvorye8xjsPgiFGckCkk 0.50876533 BTG9.33 CZK9.33 CZK→
GXgHf8Uw1Ff1zrzyCZySzpNuJxk9wXCJ5o 7.00000000 BTG128.31 CZK128.31 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 7.50876533 BTG137.64 CZK137.64 CZK
2c438a2408c30c87c04842f18081e58d9319244358a1d4d7f520349b6097c9f1
mined 4632 days 6 hours ago
Ga3GeMWVjAGBwom1TrJTpN2HaJi2Bhb5J7 1.44473100 BTG26.48 CZK26.48 CZK
GXSb97as42zYYLqTsaG1Le99Qb58sdYTPA 8.40950000 BTG154.15 CZK154.15 CZK
GUSoAGqcXy1Dw9MHYEH4wkiqKaveaq4QxJ 712.22035646 BTG13055.00 CZK13055.00 CZK
 
GMazE3p46MMXYJuUfj45XQ1pXuN4mSXBdd 86.90000000 BTG1592.88 CZK1592.88 CZK→
GJ2iebSbsNq3QSQWCqms9urRpNT8TsR9Y4 635.17458746 BTG11642.75 CZK11642.75 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 722.07458746 BTG13235.63 CZK13235.63 CZK
defabeb8f760763102e1346b4c06f16c7d5cab6fd1284ee1f4314adfed113aa5
mined 4632 days 6 hours ago
GQMtJcmBEtCRtQrj5yZqVZH3UW3n57VS5x 6217.57926628 BTG113968.23 CZK113968.23 CZK
 
GQCn4PPKNyY6zrUuyjntEHwtU4FpGf1V6i 6208.32185128 BTG113798.54 CZK113798.54 CZK→
GQZXJC9Px3pPC8q5oUfbsfuwjFVWrNw3Q1 9.25691500 BTG169.68 CZK169.68 CZK→
Fee 0.00050000 BTG0.01 CZK0.01 CZK
697597 confirmations 6217.57876628 BTG113968.22 CZK113968.22 CZK
2f2c2e032b3edeab8ac0be4abbe4ee8625fdbe04a830ab5b95a9001447c4de9a
mined 4632 days 6 hours ago
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10351581 BTG1.90 CZK1.90 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.51937899 BTG9.52 CZK9.52 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10265818 BTG1.88 CZK1.88 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10777741 BTG1.98 CZK1.98 CZK
GNjbvZ9vU1q2oWe8St3rew9j9HP6zpDfRT 0.01000838 BTG0.18 CZK0.18 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10261174 BTG1.88 CZK1.88 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10391682 BTG1.90 CZK1.90 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10231599 BTG1.88 CZK1.88 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10737103 BTG1.97 CZK1.97 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10885590 BTG2.00 CZK2.00 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10216275 BTG1.87 CZK1.87 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10859263 BTG1.99 CZK1.99 CZK
GgCcstC9M3ZQutyQXMMaikReN31MKmWku8 11.48900000 BTG210.59 CZK210.59 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10042774 BTG1.84 CZK1.84 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.00000001 BTG0.00 CZK0.00 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10301505 BTG1.89 CZK1.89 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10568915 BTG1.94 CZK1.94 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.10535938 BTG1.93 CZK1.93 CZK
GNHFSooXpTpmA4Z7TJ9qPocvvXDKTRVNHQ 0.52735352 BTG9.67 CZK9.67 CZK
GfoL7BEn7P7GxKAUVjutphcTQbcPVrPotF 1.50000000 BTG27.49 CZK27.49 CZK
 
GY4c6FmrzCsRsXLHXA8Zs8btk55UBTLZHe 0.01001048 BTG0.18 CZK0.18 CZK→
GfqApbXkSo9ZEm3gCUtj76p5uYbwP9u24M 15.50000000 BTG284.11 CZK284.11 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 15.51001048 BTG284.30 CZK284.30 CZK
08e9e518c0a103c123c8a7d36332f1d85bd8e23d4a510c69b9332ecdfa56cc28
mined 4632 days 6 hours ago
GLYMjM9dvBPDGZjjd52yr6C6ovAWZ3eLVo 7.64386020 BTG140.11 CZK140.11 CZK
 
GdvexZTLZJCxUUKicMPxrkS3qN9xrsxFay 2.64386020 BTG48.46 CZK48.46 CZK→
GT5Lyg6PCtFQTEN69Xypbezivc5dD6ChMU 5.00000000 BTG91.65 CZK91.65 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 7.64386020 BTG140.11 CZK140.11 CZK
e86a9087e93571c4e23351145d3c6dbcc90e5a39c29226379ca1374e3ac55df7
mined 4632 days 6 hours ago
GWjwFTDyL7aRyghqWApGWurpiZZzTig8zx 50.00000000 BTG916.50 CZK916.50 CZK
 
GJLWPVyoruZJQTu7vHvzTbyjmLFYhEJCKK 50.00000000 BTG916.50 CZK916.50 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 50.00000000 BTG916.50 CZK916.50 CZK
6e53625f3c1df622f7a608d602bc2ca689b3dea5b8c35b3a974133467ea7fd21
mined 4632 days 6 hours ago
GMd5mYyaRuCL6F1XyYUmnhsvQcRvwpZorJ 2.00000000 BTG36.66 CZK36.66 CZK
 
GdGVLDKrU2EYmaJPnwuRdX6QcFbvorEqd9 0.50000000 BTG9.16 CZK9.16 CZK→
GMd5mYyaRuCL6F1XyYUmnhsvQcRvwpZorJ 1.50000000 BTG27.49 CZK27.49 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 2.00000000 BTG36.66 CZK36.66 CZK
9107408c75e36ff829af8a41a82d6354af222c911d9e5971973c748c69c70822
mined 4632 days 6 hours ago
GfTipgFrqGRw4eVyVjJHfPkjf7NSPQuX6W 93.48558515 BTG1713.59 CZK1713.59 CZK
 
GZSeEJVCf7L6QxStUw9nTXgtHDUsHRy5zj 93.47048515 BTG1713.31 CZK1713.31 CZK→
GKZNvfcPzRQMgBvvbJmeYbFSB6aAqVZ4Sa 0.01510000 BTG0.28 CZK0.28 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 93.48558515 BTG1713.59 CZK1713.59 CZK
06ab044be4053c1688eece324fbb3d5c5dfa230608f59ade8a316da403c3c24f
mined 4632 days 6 hours ago
Ga9TqjChxxXn2KVs49qJMrKUbHstpTYjFc 12.01110586 BTG220.16 CZK220.16 CZK
 
GMxsfb46dhMPzJBdi5Fpvhj3Ry9xm6Vjxb 0.61703086 BTG11.31 CZK11.31 CZK→
GeZcYFSU3D5GNJyCGhEmVrYhCPa6VVCezt 11.38907500 BTG208.76 CZK208.76 CZK→
Fee 0.00500000 BTG0.09 CZK0.09 CZK
697597 confirmations 12.00610586 BTG220.07 CZK220.07 CZK
e15a0ceb4ca45d239f58ea85466e4fb6cad9ad6c01cb45ee29b9cb89fcaea6ba
mined 4632 days 6 hours ago
GS6Fip97e9nqrsKiVuqD1VDstxYtbXJPWp 51.96880000 BTG952.59 CZK952.59 CZK
 
GXNgJtoadF3A3iUpHC6dssUyvGSiFQyuzF 21.96880000 BTG402.69 CZK402.69 CZK→
GJFWW7iTUFgAphctAj2xK5zRLNF1bE71Ru 30.00000000 BTG549.90 CZK549.90 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 51.96880000 BTG952.59 CZK952.59 CZK
043e8d2ab48575c5a8a932bd393a7e75636eadc2c476ee3378ae1a5b3bd48a90
mined 4632 days 6 hours ago
GJUe2mw6ixw7qssT4RGEzxYraganKBfvxi 0.10000000 BTG1.83 CZK1.83 CZK
GJwqmtrxeqc5u31YPQT1PoxevbiyyAFKW2 9.78938432 BTG179.44 CZK179.44 CZK
 
GXwfTq4Jt1MzBnJAdE3MRVB6kMKW8w6TyV 0.12300603 BTG2.25 CZK2.25 CZK→
GLT2zUVBnHchqQcM5DH1Lza1UMYHgFeGzv 9.76587829 BTG179.01 CZK179.01 CZK→
Fee 0.00050000 BTG0.01 CZK0.01 CZK
697597 confirmations 9.88888432 BTG181.26 CZK181.26 CZK
58123280351da443d36ee389ef2cac84f3dd29996e6cbc878e4fe6e341d3522f
mined 4632 days 6 hours ago
GLC3tCynYikbcr5wsVjmCVzhGTr8Xm7k2y 0.30000000 BTG5.50 CZK5.50 CZK
GLC3tCynYikbcr5wsVjmCVzhGTr8Xm7k2y 3.56950000 BTG65.43 CZK65.43 CZK
GLC3tCynYikbcr5wsVjmCVzhGTr8Xm7k2y 10.08842229 BTG184.92 CZK184.92 CZK
 
GWUeKybr11Mtk4YqhfiFtEbPD6f9gDrsYo 5.60000000 BTG102.65 CZK102.65 CZK→
GLC3tCynYikbcr5wsVjmCVzhGTr8Xm7k2y 8.35742229 BTG153.19 CZK153.19 CZK→
Fee 0.00050000 BTG0.01 CZK0.01 CZK
697597 confirmations 13.95742229 BTG255.84 CZK255.84 CZK
d635a087f113e21105f49ea1eeef561e817c245b023069a05513250a01d4476c
mined 4632 days 6 hours ago
GJ19oDvDwkvfmxs9yTaGG9euak6qt1MDZP 4.00000000 BTG73.32 CZK73.32 CZK
GTTn2jBvZp9J6KP9s2nVvPjyouv6DHz9G3 0.01001673 BTG0.18 CZK0.18 CZK
GS8FU1j5YyCUc3kyT72wXnuJ4PwcBEXVzP 0.01138250 BTG0.21 CZK0.21 CZK
GfMAe2piT9vZsTLwh7UJrYpSyydAqsWQfP 0.18649204 BTG3.42 CZK3.42 CZK
GJ19oDvDwkvfmxs9yTaGG9euak6qt1MDZP 0.80312780 BTG14.72 CZK14.72 CZK
 
GNmq7YyhPHKcuoGbzDTZ9j3GpQYJrKq4Fh 0.01001907 BTG0.18 CZK0.18 CZK→
Gcb1yvzKbbAFFxtVbkEN55zAsLjanaxGa9 5.00000000 BTG91.65 CZK91.65 CZK→
Fee 0.00100000 BTG0.02 CZK0.02 CZK
697597 confirmations 5.01001907 BTG91.83 CZK91.83 CZK
25c5d4e1d0d684e46fc5b25bdabb85f6f2fd31a19714a5b4d4662e8485d2d000
mined 4632 days 6 hours ago
GSbdKbA2wyPR29u1yML2JKq1Fsh8yCx653 6.15000000 BTG112.73 CZK112.73 CZK
 
Gbs36STXceT6GhhZrgqWrkZFPaz1rFJnqD 2.70000000 BTG49.49 CZK49.49 CZK→
GP7vaC5HktUwtSmy4KxUnPgpGwBjtoduxD 3.44500000 BTG63.15 CZK63.15 CZK→
Fee 0.00500000 BTG0.09 CZK0.09 CZK
697597 confirmations 6.14500000 BTG112.64 CZK112.64 CZK
d787337afc22b5edfdbb80df617cfa21f3ecf0e7ff7698865dc8e7df98dfbeeb
mined 4632 days 6 hours ago
GWYUYfuwD5mDprUKswFAbvHYYWCCaVCY2x 0.05269398 BTG0.97 CZK0.97 CZK
GWYUYfuwD5mDprUKswFAbvHYYWCCaVCY2x 0.30000000 BTG5.50 CZK5.50 CZK
GHtBrWAV7UG4mY7u8npsQo1Y8kM8n71uvW 0.01000097 BTG0.18 CZK0.18 CZK
GM1vZ1pB3tfJpDUGuAsnezFYa8uqbK2CmX 0.12877277 BTG2.36 CZK2.36 CZK
 
GJqPktdURfDCiYVj6r83aaaK5uNhKiMB55 0.01096772 BTG0.20 CZK0.20 CZK→
GfDkJZALY5EbumPjyTQAFb6of5bdi53QNq 0.48000000 BTG8.80 CZK8.80 CZK→
Fee 0.00050000 BTG0.01 CZK0.01 CZK
697597 confirmations 0.49096772 BTG9.00 CZK9.00 CZK
d5f563c78f7369b5577b90003cf9ab06c27a7fa3ca27f4ca62a453ac51c37511
mined 4632 days 6 hours ago
GM1vZ1pB3tfJpDUGuAsnezFYa8uqbK2CmX 0.10000000 BTG1.83 CZK1.83 CZK
GWYUYfuwD5mDprUKswFAbvHYYWCCaVCY2x 0.39000000 BTG7.15 CZK7.15 CZK
 
GPNhCx5Qpb7eCRJCyqiV3DZ2fAaBM9UvpY 0.01000000 BTG0.18 CZK0.18 CZK→
GcFuYvf4ierZa1XEeczFQKogi4KdrcCCZH 0.48000000 BTG8.80 CZK8.80 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 0.49000000 BTG8.98 CZK8.98 CZK
aa09aec87ad04881fa022b2d1aab2769b2b2dfdfa9985955cd91fae7762160ed
mined 4632 days 6 hours ago
Gc5WFo3sYHp8SkVE7MaBw6m8CAiFoou43W 96.44191724 BTG1767.78 CZK1767.78 CZK
 
GTUmodZGkyxyQYVondszpgcSXidrLERrU8 95.82452136 BTG1756.46 CZK1756.46 CZK→
GKr2oLt96TvWf5HMu4HTB9JKvgJQfQZffZ 0.61739588 BTG11.32 CZK11.32 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 96.44191724 BTG1767.78 CZK1767.78 CZK
ad596db9527078724e3d54189539e4e56ea666d6717d3b6fad6c6bd9234e3e57
mined 4632 days 6 hours ago
GMHrC3oZiACKecwfrNh6daUy2JcmrmKkCX 4.06900000 BTG74.58 CZK74.58 CZK
GUtwmwDRvK6MavHdJBKtx8iNst4BjnrLWq 1.89950000 BTG34.82 CZK34.82 CZK
 
GP8vcFu4L6ks4GNHFwbP6hNvFH4q5BHfvB 0.03445000 BTG0.63 CZK0.63 CZK→
GToTica228zTRYUTVhpRzUZ7cQ8qNo6RBg 5.93405000 BTG108.77 CZK108.77 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 5.96850000 BTG109.40 CZK109.40 CZK
dbcbcb37d0105ef25c25af53c9dc58ffa2c6b2e1fb8552519c3a1534c13be401
mined 4632 days 6 hours ago
GYWjxToJHZJEKdrv4hAvzKFvtHC1VyFRe6 62.58264611 BTG1147.14 CZK1147.14 CZK
 
GVeMMvsmzFFV2TZL9TxzS7J74kPMEMqTcy 62.48216340 BTG1145.30 CZK1145.30 CZK→
GXAwa6NHd3Ye5J5h2x4tKCPAnXKYSxEc36 0.10048271 BTG1.84 CZK1.84 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 62.58264611 BTG1147.14 CZK1147.14 CZK
9bd2d151e32ab86b9fd96a6ffe1dacbff77259c4b7faec813248c624ef906ff2
mined 4632 days 6 hours ago
Gg3pCY8k5PKNn5GMwuhkMEkLg76fsfjPu6 0.20666492 BTG3.79 CZK3.79 CZK
Gg3pCY8k5PKNn5GMwuhkMEkLg76fsfjPu6 0.20789941 BTG3.81 CZK3.81 CZK
GSm2Qy8TQ84BuBnMv5kt2mo6BTHwv9bksc 0.20000000 BTG3.67 CZK3.67 CZK
Gg3pCY8k5PKNn5GMwuhkMEkLg76fsfjPu6 0.20388756 BTG3.74 CZK3.74 CZK
GSm2Qy8TQ84BuBnMv5kt2mo6BTHwv9bksc 0.20000000 BTG3.67 CZK3.67 CZK
GSm2Qy8TQ84BuBnMv5kt2mo6BTHwv9bksc 0.20000000 BTG3.67 CZK3.67 CZK
GSm2Qy8TQ84BuBnMv5kt2mo6BTHwv9bksc 0.20000000 BTG3.67 CZK3.67 CZK
Gg3pCY8k5PKNn5GMwuhkMEkLg76fsfjPu6 0.20516028 BTG3.76 CZK3.76 CZK
GSm2Qy8TQ84BuBnMv5kt2mo6BTHwv9bksc 0.20000000 BTG3.67 CZK3.67 CZK
Gg3pCY8k5PKNn5GMwuhkMEkLg76fsfjPu6 0.20544384 BTG3.77 CZK3.77 CZK
GSm2Qy8TQ84BuBnMv5kt2mo6BTHwv9bksc 0.20000000 BTG3.67 CZK3.67 CZK
Gg3pCY8k5PKNn5GMwuhkMEkLg76fsfjPu6 0.20060603 BTG3.68 CZK3.68 CZK
 
GM5NgmgWP3RtchJ8H9XxEfdnDBKJdw88MP 0.03966204 BTG0.73 CZK0.73 CZK→
GLL48aGFcenE1A1z332xtd57Svq6MpGrYF 2.39000000 BTG43.81 CZK43.81 CZK→
Fee 0 BTG0.00 CZK0.00 CZK
697597 confirmations 2.42966204 BTG44.54 CZK44.54 CZK