Difficulty
Height
Hashrate
Emission

  • Confirmations 1319057
  • From Block 1816367
  • Timestamp 2019-04-19 09:28:49 UTC
  • Output total confidential
  • Fee 0.000323390000 XMR
  • Size 16752 B
  • Ring Size 11
  • Extra 020901d900138a455676a2011f95d88da752953d89aefe1c6d0078a60bbb3f7c436ef3dc55fb4aeebfd7a998
  • Unlock 0
  •  Confidential Transaction — amounts are not disclosed.

Prove to someone that you have sent them Monero in this transaction:



Inputs (19)
 
Amount
Key Image
0.000000000000
fca61bb92d9a0305a50eaac94bf61168b7d64f2cc9313bf77262aca3ba85156d
 
From Block
Public Key
 
1503681
d8625adc8d46e61e79b18a910ae3cdeaf66a7b49ac98a85907294ea43b15b621
 
1717419
4bf5339d17c594dd113615d5a64f57b31bc3306c981087f3f07ee49b9c8aae2c
 
1794653
d5a7284952af0b342dc9a197bc1c38b4994a32d078f7fe6f9aa054257fa63c05
 
1799289
2ba52eb4d8d3d441ed7eb72ac235a9252ee2a2fb9dfb86c0795b38c9b1b47620
 
1808149
6581d037c5f976c1605cb23583af5c004c5c1506f8d238dae31c1091b08a0fb0
 
1811790
4c3b632746fe60b9b152a5fbf1cc3f72c0e2d0ab497ea9146b5412e8b88236f2
 
1816168
f2ba6b70135dfa43fea966862bfdca57c57a52ced9a6302d2e3d7621ccf2c6f6
 
1816288
2a10755ba8bfbb50e538f3dbfc73541200330dd565e2728bd4aa8b27845aa183
 
1816351
0a3ee68b8f912a916b5aec758ac47ee1816f76a3367cab20ae040f9578769c6e
0.000000000000
de8a97e63a1111a23db29d3732e486a2d6616ea30b09598d14ea0d0914a7e3ff
 
From Block
Public Key
 
1633873
cb57862e1e751dcd3d5e15affbb3543d42d5794a4ffef38da178d86f7cfd7319
 
1809742
12a609dfd852052f0a46930c2928d9862766669ba4a9b1a6b8c0917feb8e6285
 
1810965
571481bcbf8a369c0ca90411c16ef91cbb2c53739be805539cfb9be0e3759e9a
 
1811031
fae00f3f3940059cf335b42876ee5bde2475a49e6f9f558ab3fe9de044eaf7e5
 
1816094
121e67e56cbaa33fcd086efbd8ed8e993aa7c1599dded1432f4ec5e9b45b7ffa
 
1816171
f7b65422c2ea4eb2463ff855372a73876c37d606078a588d27daff8250b99333
 
1816342
309c67af81bf15f1189422424c0bee7ee204bcce8620b09fc53d2e4298425a31
 
1816348
c64e1c62b3e67aa230d369597a54e6af3d805bf6880ebb3a85db15e28aa4f0c1
0.000000000000
d2ee15e0c8bc419c480b090a7411d2387573411fe3dcb850a17d7ab9cb2fe6a5
 
From Block
Public Key
 
1613687
c28e4b336991577343e409732810c021388bf5cf584aeae151e035248d30260f
 
1803192
954e74a3b797867b8a892d3c7096097df94156b2a3e85bdc99674096632ec095
 
1804051
9d85f0aaf68a94b600eaa39e2f229bc0a62f953acba37d16b603fc9519db432d
 
1810384
63a0e1d3ca74d7642d5d0a158809470f95f5ceb4e0b41f757759752d5be8ec27
 
1815930
8254e8cc694576341500deebd494c3ea339f33fb807dd8082c07daff9f02948c
 
1816185
0551b4fba8a1f073b40d82a4c6d35cf4384bcd678848a1d217f5af82de044507
 
1816215
50992c14f83860ff4c99625749c6a2668cbb48176fce5425dd1d938ac8335f63
 
1816230
efb5229429f8a0c11e927579b4173eedffda8848237a5061fcce022fb3213748
 
1816313
569f9c6e7e403b98c062b41255203a69d9aa419a5e79c5f1c47a4b4e9bae2b9c
0.000000000000
cf483c6adc2890b229a503ad419a7364de983f0231c327d90fbbc4bde9d7b83a
 
From Block
Public Key
 
1679703
078eec221971d59edab68512ae21a97196feea046fa0066b6e2cd072ac7a58b4
 
1778642
8b5e79aaffb9143d88c9a6e61a73b0565bf4b5d7cf1b83a949de24d607fe9e75
 
1798587
455ea81b472649291833121a41bd1c5073216b69a195c44c8cbab3b3d725e5c6
 
1800618
7f2eb3605ea6cfd8cbbf370f607fec10a3e8f8caf5420abcf02799b231dd13e0
 
1801962
29ff851135c59e1095895d749000958df45099fd7442c0fa8b912c9e8b6d4347
 
1810262
d0babdc00a9c42629e5f3e591e1b42d01829eecc5427af9527b7b6b85e1df10d
 
1812152
6764bf6570b5f01e285f21e799605151ac0e7e26d9342b0a7738378eda6c1b98
 
1816163
e555673ef59de50ae4f3a665da29ee2dacda74d93b3eafd427c77c1842bd36a9
 
1816313
eef05fa24ce2044967a0291f1fd02d1dd5faa5211ff8c1108b52124fe469ed6d
 
1816323
b3550367712109a6a0ebccf14fdb1d9da6b6a64722e02100d2ea5a82b4d580d9
0.000000000000
c6b6accdb852437cac3a0df47e21fa4900ee7e230aaca9ddd815fd7219715442
 
From Block
Public Key
 
1698646
35e13fad17bb829d62f0d6674280442431db310919f59826e77d5ba1a986a620
 
1805500
ec1cf2c3c272141348b20ba668692e7bd09aef41c12da7f28bb5f5137d376cfb
 
1814778
22c7f5bcc648e27678fb8e2e067e171bfbb3e1f6a93b731222090fb3844ac2f3
 
1815008
e6e5dd4436d4bdeff833764ead87a9e223d8bd8353c67e236c1c9207b265353e
 
1815520
12b6472c470ac1131d2e1775ed2c0ecc06da085c2b03f54671c7efda83eab35e
 
1815995
abb80d8baa5fdcb2448f2357f6c0affd22cc00ecc358e92dfae79e809b453570
 
1816162
b1c23e3b6dddc2abdf0d1205c6e33cc22d02adf8b682fef4da342686b41e0612
 
1816192
876f944d9ab316f37db19345a478be1ca62b100f5ef758a61d7ac320318fec79
 
1816220
3f311bd587000828cc29b810ebee1c5eaa43f1784d82d67bcbf4a82ffb3ed7f4
0.000000000000
c2a4e1738975f78d24a47f0e51847c2f88904750a10a0a9f6f28ec3f7e88e7ef
 
From Block
Public Key
 
1664975
1253a9091603162a64db55d517ffd41a4e917589c6bcde6dd43eb9838097c053
 
1771056
a745724549b9e76cd8d03b3f4352d4c9587f7b1fef98fb16bbcf6bb7993dc619
 
1785573
5daa2e259d70e58e025d868b11eb154cd5d9f48eb65f4503e4560ef456450b39
 
1810677
d007ffbfc189a6512a40ae20fdc63ab19c4459c7a89bda90ff86f1f81401f3ba
 
1813414
7f2a20b44c92f02edba523fce289c48759b5510ca9b46b45df8b61b6a192d4df
 
1815542
2aa7ca853979d072778b346c95778114a24e7fe60a1c445bc7865b4b433afd4b
 
1816064
a67070530549dd778aeae78b7c03cd337c247ee4f63e167f1a7f0907ab4654ce
 
1816110
1c5715dfc59959ebd1eaa12b16eed892bab818bd4b1bcaa26d45c2e7fbbaed69
0.000000000000
bc0cc41e41d9c28b9b98b8c5ab0cc347df3866cc6d4cfe1e09baa9be568e15c2
 
From Block
Public Key
 
1543327
16f923fb1bd0ca1e3a8848558ba33b9288d01747c46e40dfdfd9ca5efbf12eb0
 
1725689
0c8e13e67c41c7ab2550ab6bfd737ac540107d7294d298dfe11a957facd9c482
 
1795848
9ecda5101e8e1b4963f5794274710a87fd7d0efa431565cb5b7fd3b4e4cf5db7
 
1797681
572d1942d782865e1657d1c2047f6b1b88568664d32f383b4cea2c33df52453f
 
1814110
c46833132ca311821bdf0dbb71fe031be125552b5a1782a6b97b5a845ae355d1
 
1815102
7efd2716382401b82fb572c0ad196124c6123d82e72f1df1e1d2d1021e777d08
 
1815912
8e9fb83aa95e10515a244b5c950aecc8642966321c23863c4f502c507bff31ed
 
1816311
6f884c9c9a2e7841c9ea01f388b6f68328793f263ab89b8041c730d42c9ca2d1
0.000000000000
a91ae9204c7118d958e9a8e6232547b4832ab619f5bb5266ce42a4610f9c5ce8
 
From Block
Public Key
 
1511616
b928e6be99dcb378158d4681ffbe53232990b236804eb5c704f0851e5e5f3937
 
1700866
9094f073168830776212dc91e9c61ea075443dbe036e5d8ac39de561cb2d7312
 
1813948
cdc97c77abb04eb6095d6bb851c714df1046212fb702513070b8f3e52e9cc1ff
 
1814890
2752fc941fd39149dced971fb921fc8b37b4222025a719b24b4a5ec314c7efad
 
1815575
316f0f9acfa7787a16628189d2c31ee2943028dc5f0276ce7591855f42ccd8be
 
1815777
3408c0f69f917f41b2452c8206520996428eb73945975d5991f9dbd0bee4f9d2
 
1816131
09d488c441c659ac1e490774a9d728ab71c56c04f638118cfb8757e2a4f2e63c
 
1816192
169b2e5204677da2b7f229636aded6bd9d16b1b4571741398911907fdaecd9b8
 
1816221
0275fccdfa5955781c4bc07b4c3fb4770feb85137ed42c8bb536afed96ce976d
 
1816238
573b0650f624aad9a3cbf14fe6f4133b132e8c7e4b9802b9d7ceaa53379bd1b5
 
1816311
107922c6168b3cb6c5f0583ad7e45109eebf4d9e73293a2d04370aba412451e3
0.000000000000
a636f595c7d91d5700d970c2395b64e768f867b58b637ac7302eb434d544c1aa
 
From Block
Public Key
 
1745876
e7d16a0cf4ffc5dd3004085cbd8751b17d88fc88355c7ed52e82fbe0106b4ed5
 
1796334
f5ab4348e810284cb5461dd78bb3664f7a82e4677f851ad674d3c66dc0da94ed
 
1812280
db1f9b19b522c6c90b83c71366a95090b87f0ff9858642036f1ebbc02919104c
 
1813159
fe5e5caa7c740e813ebb5bb4288bfa231f8ebb7e363bf5fb0589f20f3744a6a4
 
1815176
8aed48739b3d6ad27c0e8a9512f101438b7be8be20205903ecc47a66188c6819
 
1815757
a24b3ca8202a7e3194a999cc9a53071d40e978db4cc3463fa96d8e596114adfb
 
1816203
300ee3c3a1e889a26a45bc53e4b836aa3cc7864dccf5f36606e8a4ad85d7a95c
 
1816301
22ba610a4472961885b73071a568a418d633023f44c05f889581529d5e713544
 
1816309
632a1ab7f02c6a24150f576a5ecd91d03e408258f351609a1306f4f9a4ae5256
0.000000000000
9c87b14c6f93c0eeaad27b7b34d5344cb2b1b1d51b4a43d3a79cddd6b3f49449
 
From Block
Public Key
 
1808641
f7b1f0127c0488d7d8a49153651481f2567499d3dcc240f635802e587142c1c4
 
1812189
790f84bafa8ad94084b9854cbdabf2248892e2c32144f643b7139fcef4da6077
 
1813572
281e879e1a7381844157153b3b3439dc4a15321614c836516311707c3c0bed02
 
1815710
95e73644851fea3508e8c889037175eaac0032c91d2cd3750f8bbb2eb69765ab
 
1815810
59bdcee596d15f71173c9cf49f6d3c2f1732bf8d02535c2c4750f24309b2f41c
 
1816006
3fd2b85054e44cc70e19bdba621aa0c7e93a8384714b544ffcd604d8163680b1
 
1816324
fa2f32dc64049cd92fba94a59ccb46c4ccb49b670f6d3f7e2e6c8a268d0453b9
 
1816339
36447f69a79d6b642876b05ae1ccfce913132c6b131320c891ffa971c7821e35
 
1816355
e789b56e5cb84869de60042834a57372de428026920c7520986967694a8d40e2
 
1816355
2dacbc8f071d7935765c87a925ba95cec085567448fc17c6d396a69efc522ad0
0.000000000000
98d55656a28d3ee330f1d893ab8e72e4547e67163086b1a895a94f8e615884af
 
From Block
Public Key
 
1648338
c21f37538e29f8e0a39581c07e157811a447de73c64123b6729ed306e8c99a98
 
1769636
61723075264dbeeb91bc38e906668964fc7efc6910357172985a9d5e7fa3e4d0
 
1783643
46c6499ebcd4d5d128f20cb0d6872313b7e320002358e2e1eeceb40a3a018c12
 
1789227
a38ca13e1e473e629231fbcfe8a0a1cb6c08ef7805c7b6a6c35950eac6786c7d
 
1789495
d862d5f343800ad5b3a56d20e55e44d8a2ebdc4c782f241ceb5a194875aed29b
 
1807223
9168dd36e8347c95134cc3f39c6aeb647d3984fd894d4ee66162a8935e44da93
 
1811103
49bafe007b844045ee9b34cb65ad76374d9abb2d11dbfd89c442dd5a6d1577fb
 
1813423
0552ee780d4cf9c2a08214b7c4dbde14f5cc898d06fd84a64ef07203db5cdd21
 
1813707
72c02eef50a5d5ef7b968c5798731dd8b6b66fb68dcd99c7908162b730be567c
 
1815946
e85768a5ea91ebfe6f1b7fed512cabdfd136a069458e6e7139b9d64cfb2ade84
 
1816355
392c3453c021a7cdaed2d062fb90d00d290ff73d9156030e09479e92f7e2ed1d
0.000000000000
93d8da61dd8872080dbd9e06a5c9650d1159ef6aac7768d43a3c9a09963a45aa
 
From Block
Public Key
 
1642511
39e9dd71e2803dffad511e2f81d56a71d66b1c822ff15ee28c917a2c168b9341
 
1778073
fae39ffe3cdd2f944f24b3b378886f76a29ec2700d58ca6592a229d54230454f
 
1814856
d3e9a9d682f3a7e056e88cd7a152174b3d325bd1b6fefa230bcb7aff453554aa
 
1815306
360665754d598250735e47a2c1296b620b7716ce337225a9c2f2178aad2a0a32
 
1815740
81f0565525f852407fdb8247daa16ba374c151c9bf38ae70ea7ef84131140525
 
1815800
3486b618b562145e6376bd52ab25271ddbd5ca156e69acc4ce85f9b015c1aef3
 
1815993
3b054d25bebe297eee875335bc49ad0f1a9a66266892abe84f387bd7908690a6
 
1816042
873236ccd66565ff7c4ee4c1058a5f2b1370a5436aaa6ee0e9d098367773b3fe
 
1816052
ba2d70a691e828ee0cf8545e7509585eaf2fb5ddce07b639b1604bbf883732b7
0.000000000000
88a9846aefaf24cf904c7273680397a0da3113f89639b8439579a838f3f2138a
 
From Block
Public Key
 
1645442
2d70d422b7f3a2efc054b42d572f7fb54b193c51567af04b4cc45cdb26f8d07e
 
1803021
96a66a46560d6221cf6cffac9bd9e886a18e068b03e1c123ef0a6d3fd56f8f58
 
1813321
f2de182c65f2d403d2051a86e8a3421b23f0e1f110fbc1d67c3f36b5fb653df8
 
1814836
12427845d93db2111eb730ccd24249e9dc33b6249a9351117f11d0a9d324ae74
 
1814964
0024e3f058f1894f34c08f67058d1aa0a694685f4b2f5bf29df68598020540b0
 
1815331
591d72ccdc75846a5435090cb7f22e8e77b510e9826e6725f60ef698c1044571
 
1815562
6611ea8973e63dc4bfd38baaf4c35cac54aaa23f94b1491c1b69de1d827d9cac
 
1815888
df3ad19af7a8177f008b40d1ec79f154f84d84cfd552c3745e73c718303f4735
 
1816237
043bf5ba0e62f69fbc540958c2e078258d9b638296b7393019c59c4756726158
0.000000000000
6d8b7e1fe06064367f8c0768b40bf402b5ada5524051b4308894b2c3327fd6c7
 
From Block
Public Key
 
1477889
78cc63fef118334dffb0ab9626cd4f8d61fb458b81b685158ca197274e6c913d
 
1717735
2eaefebad41d1a28df48a15f0324a905aa3a206f7866f029fb3eea9d98e63810
 
1789608
b924ebf92aa20fbae0344a72fef576b63e199ec5e5a9655e55a7841aea7ae3e6
 
1798792
6c716e1e8b4664ca1963dc63e7edaa4c0fa219eb03368943da20702106a694be
 
1801743
e130f90ffca411f858343434cbd7394f988fe9be0d831ee923bacb5fd133cc94
 
1810272
0a6cb956e1d44f26c30e096d034ec5ad2a8c3a3fb25547df358aaf63dce84238
 
1810587
4cd0772805ed3959042923f9c56e306663018ab06d21b3408dd194c2fc276189
 
1816202
87f59dabe6d213fc38bd483322f009d0dd8bc9ec2a3502ef3d2c09c2768b0196
 
1816342
364bde95ccb916d5552734b12b3198015dfcf8c6a3ea57fe3514de1c1dabe409
0.000000000000
54f77042d3c245c01d558cb28c6f2812b4b358a8e64d55159a782f4b252f1c6f
 
From Block
Public Key
 
1530333
4743bc4b82ae2937138c0518cd19f0b71ca8b95e7455705284f7d1b425f51bc7
 
1643946
062724cdf4d84b51d8ab41f33ac9af492a8a0831bc9c3e0594aeb21dc5849f20
 
1785088
7f8f8604f0c9546102df7f565c827a5013e632b477de22b2c9e960b083efdb28
 
1790998
8388248253baf15bbbe50ecbd0a6cfc0d2cc36ebfc8c751b4034ada1036494a2
 
1812398
65ace5d893b59dcbd52c458b33dd4f39daff6f7559ac48261a3a2e8abdd58194
 
1813699
196aeeacf26f84821179442a03db538f826fec27e2fd370b6cff816bfa9c464b
 
1814615
8b0e8f7c29bcfb6feb17e0fc142e951a9b7616d0893d3952d555ee53f202814e
 
1816015
48cf7eab5babcdc8c2fd05af4cb27721779820ebc2a45044354fae782c4bf17a
 
1816019
f198e229ed825819423fc52b156082e0a3d83105ed2e0e81b547b1a4eda95422
 
1816248
eb71e5b49388276d4cb0148cd5ee2db45c6ab6c83b662f2384999184f6fae975
 
1816307
bc2498436734d5825a35c4b428e25770f2bc1ec89a257e368688b8c4e9961cb8
0.000000000000
38e18213d7c1ced47a86aec4cb4f0df46c2418ef38e0c29fa8e4ca0f2f82751b
 
From Block
Public Key
 
1726366
e5d13512a8b8592fe53379c1c16f7054a2a77d610c43673f4838b18980ad5bef
 
1729285
b62333b4a76d5dabc7bd03eed112d55bcfccaeef16348e56f64d946d9ac1689e
 
1780601
6c601a2e13434a1957e97d8ed42eac54333b6191a97a1e38e77e9361fd100fa9
 
1810275
07cd6485a67f2e4c3c0bf126b940104aac0380e887965db730567ce44a05e89e
 
1810592
2c7d5ffeeda5cab738c6a86803dc802160e493527e0afcc00db84c3a6fe08923
 
1815096
1f646f05c89a6844577c3c6e8a131878d05cc6b5fbaedd6865bcf3064312dd62
 
1816008
0fb3b059e463b1c736234db9893d933f279e1487968d22c0463e553598b4a7de
 
1816129
cdaceb630266ab55a056f452c41b79cfd10c0ccebb1a3ed52643fc20950f466e
 
1816239
701adea932ebb85ecb7709ef33c82e6aeaf508c54585c0c4ece04b7e843ff1ce
 
1816335
0b449fee49b896bf188a8a0066a1218571dae7b408edf59c9bacea08995417cc
 
1816344
d5f0e7800ea822086b9815ca46b025d41696c945f859bd50ab8462434c5ddee4
0.000000000000
2998e090126ccbc7b5cc0c9bc020e3c0e50da577cb96791641fa0e18340101e9
 
From Block
Public Key
 
1508032
0b0bff39d369f84a5ff4bd1473d25719bbcbcc500aca973903c60c15de23be3e
 
1754091
3a6872bf78da414efd42a7ccc9affcbd0b2227c29ea3be5a8b029809d2fe1fd8
 
1809757
c4e06e0b6a480b0155f5bc8c9d0a53db982a3d2f9c8141d1541d36fabccb0ec8
 
1810114
d63f4bd29264036e3e3d7f2cd54a1e5420c7876ea9ca8161366b150dbd814883
 
1810205
46e22dbca1cb490befeebf26799e353c5a4b9bf27a02ab2d29c9cfc77b200f98
 
1815869
f75a01c9ad3416d7eb66a6be3f792a4ef8cee15f3932881fa69d9088f366ad8a
 
1816036
b3a6cef5a640616a117b74fb866fbf9266ee5b1c270aa6e43ca87d3bb478ced8
 
1816160
53e8336ee31b22f7171b2be8f0b513c039d837744a21fc55faab26c7cb58ce7b
 
1816190
19bd66b9325b9d5c98b9fad9d8b14b4a744272c666ee940b76b735739ad8727b
 
1816253
7765a81ff16de9274350ae6ac565304339e63e88487c42878006593c2f8454ea
0.000000000000
274ea1478cdccb28a81f6a1ae908e77c42ee323ba63cb8071df2cdade3464b1d
 
From Block
Public Key
 
1734276
6c3de55b8db45bd94f218ea82c82f70989b44f1b0c7c4928f9ff9b96dae75235
 
1786447
522acc63613a99ef4ee29ebb12f5b4eeb2cc4b32832c955b12cf838fec6b5434
 
1808842
acf131724099579104ad2d252773b8330a368374264591dc31969263c300d4b6
 
1814758
f2cbba71279ff6b198ef1715d2d3fe15ccbe3bbcda2ac3ae69aaf8f91b0a2278
 
1815895
35b23c2b86468f868019190b314867fbc3ccf15d0c5783b1d13339051daa245d
 
1816254
143b113054e3640b0048a2f8e3a52e21d5b2d5ea61c75255b460f58783393223
 
1816286
12112a90cbc2e2889cdf70089becf67f879e38937ec66bef892994e051caccbf
 
1816330
61e8b743260ceaf26804f8c654c585166694178dfbd492a03c6330f288a23fdb
0.000000000000
213d939bc879dcfa053585468c345f1447cb84a19e065229b75bd362728c0130
 
From Block
Public Key
 
1467499
1cd3c9b0df5e0f2b01204d8471c177242e651707e007330c69a49af43880a962
 
1605791
fad15b7d9ebe1fef41b6b7f1eef1cf92cb8a0011c0c4191485b015456fba6312
 
1784110
8d5288885ef4633f641d7458787c8d84c98729d74569714d6350a2d407466be7
 
1801463
2cd7e7134c7fad7fd3a348a842b1e9ecef41a3e042da39312a1fa3f7f1834084
 
1811933
dce51d6d02dfbb683f9e8ed4fb279cff578f1ab0410a81cd9a96b5e5aa4aac58
 
1812858
7ad2a68029a72c36b6d183faf9d204f2c7fcda932b20df85a609154dfcab8005
 
1814793
60fce56f0eab24f87680a8cec116044b511705a816e7858993afd542d24cad52
 
1816185
e33f2da227370431fbf25381500fa28cdc70d44c2cf71c8422e2f843cdd20d92
 
1816319
a57ebf4d1d50cea7a8a0725156fa88b0f88663901025908c9bb423d5b53aa80e
 
1816341
4924a4b0c2039befa396141835857e06edde99e0a94271f05d874a1e79ef7fd8
Outputs (2)
Amount
Public Key
0.000000000000
9e95f37d60b50156adab61ab677bb18113ba132b58a1111d11355e7c2f9d1450
0.000000000000
0515a87bee558395323a1e1048eacd5701911732fad732a9c972c510ea4d9cdc