Onion Monero Blockchain Explorer

(no javascript - no cookies - no web analytics trackers - no images - open sourced)

Autorefresh is OFF

Tx hash: 15a7dc554208a8d9e717871b85fe4724b74383e609cbfa606062eb8b940d61ea

Tx prefix hash: 31e8bb229da14c975c3a0cc249d92b4f7e49483fc5b4e226e806ddd6a1224b14
Tx public key: e560751debee1c812dc9c131cd6d0e266136f2e2ff972264966b9e7f8c738028
Timestamp: 1580527187 Timestamp [UTC]: 2020-02-01 03:19:47 Age [y:d:h:m:s]: 04:321:14:48:24
Block: 2023771 Fee (per_kB): 0.000100990000 (0.000027199832) Tx size: 3.7129 kB
Tx version: 2 No of confirmations: 1281319 RingCT/type: yes/4
Extra: 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

11 output(s) for total of ? xmr

stealth address amount amount idx tag
00: 07ead2779cfdf71748567d7b5b92be76bdc542929298ea247d0fc7295c136ee3 ? 14661869 of 121785356 -
01: 0d0a9a95f927cb4fed2aebc5ed77cd832a40619b192b7bee2bbf371ee9f29d56 ? 14661870 of 121785356 -
02: b63980af1c90012de7b6e0f9e63825a6649ec60ab571413d48c3c7e5cbc24af7 ? 14661871 of 121785356 -
03: 6d13a31ed7c849383665d26f90037a4376267443573536bf846186d42f0f5319 ? 14661872 of 121785356 -
04: f2de09db6c110c952c1636e175c0cc21d1c8a289b597e827303c6e173fe06aa3 ? 14661873 of 121785356 -
05: 65b5544ae2facf0add91c4d8a38cd8e53122450b2acfbd60f169c2530371e066 ? 14661874 of 121785356 -
06: a1d248b7db62a0cc3fd9bf6993856c1137ff798cbea773bc6576ad0c664009d1 ? 14661875 of 121785356 -
07: 55abb29a630aa685573f60472a26ba4241431952d79bee1dfa95d192751dd2f0 ? 14661876 of 121785356 -
08: ff5b1dd0317c71ae9940bb52e334ff12ceb3f1e65c8104fcc93c72d04a972a26 ? 14661877 of 121785356 -
09: 4ded6ec21690fdf6c17e310db93b6dfa1288dc8b3522fcf798c7a5db202a519f ? 14661878 of 121785356 -
10: b2c43f35e1ff5e3518c8a2227ea86f132e2814e5f7bfe68060afca9271ab5e4d ? 14661879 of 121785356 -

Check which outputs belong to given Monero address/subaddress and viewkey

For RingCT transactions, outputs' amounts are also decoded
Note: address/subaddress and viewkey are sent to the server, as the calculations are done on the server side



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

Tx private key can be obtained using get_tx_key command in monero-wallet-cli command line tool
Note: address/subaddress and tx private key are sent to the server, as the calculations are done on the server side



Inputs' ring size time scale (from 2017-01-10 23:26:35 till 2020-02-01 03:29:39; resolution: 6.57 days)

  • |______________________________________________________________________________________________________________________________________________________*____________*__*__*|
  • |_*_______________________________________________________________________________________________________________________________________________________________*_______*|

2 input(s) for total of ? xmr

key image 00: b25afbdb792a372b4cf03ce9b876782ad26718e03102aee7b74d9f69662b4c93 amount: ?
ring members blk ring size in/out timestamp age [y:d:h:m:s]
- 00: f3377edd7f36307ea33241d7218ae646efbea6e1477e0c7b923a405575a0a080 01928622 11 13/16 2019-09-22 11:15:32 05:088:06:52:39
- 01: a346e253e47ddce6946797639ad36011eb3d531f5486be8a8765766d0f5f903c 01992550 11 1/2 2019-12-19 21:11:15 04:364:20:56:56
- 02: 99cefa23ce2887c387f976edd0f41bc15e70acdc430c980e4deca8febe3ff1b4 02005306 11 1/2 2020-01-06 13:28:28 04:347:04:39:43
- 03: 06fdb0c73f273003e81d46de0a0ef1a4bbf2ec4f84225af17acbd858d809aa07 02020511 11 4/2 2020-01-27 15:27:17 04:326:02:40:54
- 04: 16ee7534360a3048a9be8aadfc1ee67c4520c1ee923278bc33a7da27807ab791 02023202 11 1/2 2020-01-31 09:24:46 04:322:08:43:25
- 05: 393a92bfdff80a8e5df4b14fdb2cbed306b8cbe9ab63785d084a6b78865a6e64 02023442 11 2/2 2020-01-31 16:55:44 04:322:01:12:27
- 06: 00654aed84730461e6ec525e3b11cf9f50368ebc9ba539a0946b6173c56b428a 02023649 11 41/16 2020-01-31 23:40:59 04:321:18:27:12
- 07: f5ae6a04543d37f555c8590a1ee8df4c71bbb019a787333415630a62f616ea5e 02023665 11 2/2 2020-02-01 00:10:19 04:321:17:57:52
- 08: aec614b7cd0d347845ae8c8e25d64f03090ac72d7641c264ae55474caeb968c9 02023704 0 0/1 2020-02-01 01:09:08 04:321:16:59:03
- 09: 9fa492ffbed69536a132f3ed7a1bd176d12a13901a92555617ff84cda45c4476 02023718 11 7/5 2020-02-01 01:46:00 04:321:16:22:11
- 10: 9b8e13ecd93aaabb5e1e5181c8dc1259e7cf4f95899204befdb7462e130c3c6e 02023743 11 1/2 2020-02-01 02:29:39 04:321:15:38:32
key image 01: a7daf0edffb86c6022a5849e1c218a21cac25035169d489f66571936aba698e9 amount: ?
ring members blk ring size in/out timestamp age [y:d:h:m:s]
- 00: 0d1362bf65b320f6dcca2a635992dea17f9fe7381fe1a1159fc31a89713a109e 01221058 3 1/2 2017-01-11 00:26:35 07:342:17:41:36
- 01: a740df3564031198cc2725a737e629c41d8cef009d3098bbd3647d0fde2939e2 01981662 11 2/2 2019-12-04 18:40:57 05:014:23:27:14
- 02: 90bec261b72dfcdbc330c3d452069c0b4f83bdd3709874a7febfece99bccf6aa 02021725 11 1/2 2020-01-29 08:05:43 04:324:10:02:28
- 03: 058afba49a688289cbd521180e9528eacc9e853b5e1bbfad9cd90c1d38050a99 02022997 11 2/2 2020-01-31 02:40:15 04:322:15:27:56
- 04: ffa5de5029b87108d6776402b2c6d071801e3e6d9e59d8da855228855b1acb60 02023368 11 4/16 2020-01-31 14:16:21 04:322:03:51:50
- 05: e11a932045e0be7deb1d51f9a49c71b8d6d3344cb703fee911ec1953c4e122ec 02023567 11 1/2 2020-01-31 20:56:20 04:321:21:11:51
- 06: 26d9cab327bcf8482d92f19ac87f31f0f6506283090c3a66542e021580d4a7cf 02023616 0 0/1 2020-01-31 22:22:32 04:321:19:45:39
- 07: 7e1385b017e7f82f16576a92c3d5fa6caf37ac94341b7dc099e46f5e26b9cc50 02023674 11 2/2 2020-02-01 00:23:00 04:321:17:45:11
- 08: 9d471d513105c0a88fcaf9d5f73bc527e6adc83620f6c040e9eec3f70096ae2e 02023698 11 2/2 2020-02-01 01:03:56 04:321:17:04:15
- 09: e528163a20a21cccae475fe8221fa90c6deaddd224cd6b1e1c910f2df3fbc6da 02023707 11 2/2 2020-02-01 01:15:42 04:321:16:52:29
- 10: 9864c9598a6f28139977b1500c937595c31ce893b501d4d011a5ec52e5ca0a80 02023736 11 4/2 2020-02-01 02:14:12 04:321:15:53:59
{ "version": 2, "unlock_time": 0, "vin": [ { "key": { "amount": 0, "key_offsets": [ 12440138, 1396924, 313568, 425912, 73283, 5302, 4610, 342, 629, 295, 370 ], "k_image": "b25afbdb792a372b4cf03ce9b876782ad26718e03102aee7b74d9f69662b4c93" } }, { "key": { "amount": 0, "key_offsets": [ 2574, 13584900, 1020465, 37453, 7747, 4786, 901, 1407, 453, 75, 470 ], "k_image": "a7daf0edffb86c6022a5849e1c218a21cac25035169d489f66571936aba698e9" } } ], "vout": [ { "amount": 0, "target": { "key": "07ead2779cfdf71748567d7b5b92be76bdc542929298ea247d0fc7295c136ee3" } }, { "amount": 0, "target": { "key": "0d0a9a95f927cb4fed2aebc5ed77cd832a40619b192b7bee2bbf371ee9f29d56" } }, { "amount": 0, "target": { "key": "b63980af1c90012de7b6e0f9e63825a6649ec60ab571413d48c3c7e5cbc24af7" } }, { "amount": 0, "target": { "key": "6d13a31ed7c849383665d26f90037a4376267443573536bf846186d42f0f5319" } }, { "amount": 0, "target": { "key": "f2de09db6c110c952c1636e175c0cc21d1c8a289b597e827303c6e173fe06aa3" } }, { "amount": 0, "target": { "key": "65b5544ae2facf0add91c4d8a38cd8e53122450b2acfbd60f169c2530371e066" } }, { "amount": 0, "target": { "key": "a1d248b7db62a0cc3fd9bf6993856c1137ff798cbea773bc6576ad0c664009d1" } }, { "amount": 0, "target": { "key": "55abb29a630aa685573f60472a26ba4241431952d79bee1dfa95d192751dd2f0" } }, { "amount": 0, "target": { "key": "ff5b1dd0317c71ae9940bb52e334ff12ceb3f1e65c8104fcc93c72d04a972a26" } }, { "amount": 0, "target": { "key": "4ded6ec21690fdf6c17e310db93b6dfa1288dc8b3522fcf798c7a5db202a519f" } }, { "amount": 0, "target": { "key": "b2c43f35e1ff5e3518c8a2227ea86f132e2814e5f7bfe68060afca9271ab5e4d" } } ], "extra": [ 1, 229, 96, 117, 29, 235, 238, 28, 129, 45, 201, 193, 49, 205, 109, 14, 38, 97, 54, 242, 226, 255, 151, 34, 100, 150, 107, 158, 127, 140, 115, 128, 40, 4, 11, 210, 147, 228, 136, 103, 199, 177, 114, 111, 134, 129, 192, 136, 126, 160, 74, 122, 255, 11, 185, 119, 235, 46, 114, 212, 248, 104, 106, 180, 216, 216, 150, 76, 213, 168, 191, 250, 115, 57, 95, 10, 50, 92, 86, 100, 68, 210, 27, 13, 84, 139, 113, 113, 35, 140, 100, 144, 185, 95, 136, 11, 250, 222, 54, 152, 17, 80, 141, 84, 95, 78, 82, 115, 28, 150, 177, 18, 228, 125, 129, 34, 223, 127, 241, 17, 2, 103, 17, 139, 14, 111, 187, 161, 134, 247, 11, 91, 150, 158, 48, 57, 173, 71, 136, 27, 248, 69, 241, 96, 42, 12, 255, 189, 160, 31, 155, 136, 179, 63, 189, 12, 211, 85, 241, 234, 15, 18, 159, 101, 122, 130, 10, 42, 202, 28, 142, 163, 143, 254, 100, 88, 238, 109, 38, 216, 206, 46, 172, 1, 103, 193, 192, 153, 247, 127, 11, 31, 192, 17, 90, 230, 180, 197, 22, 67, 186, 239, 120, 247, 253, 251, 18, 8, 172, 77, 56, 33, 202, 165, 150, 152, 238, 174, 38, 137, 157, 9, 96, 164, 5, 30, 109, 30, 27, 255, 191, 239, 142, 221, 82, 247, 110, 237, 166, 134, 139, 159, 106, 47, 4, 81, 87, 120, 89, 128, 252, 227, 12, 33, 40, 108, 45, 147, 35, 74, 88, 231, 145, 75, 98, 152, 241, 97, 110, 42, 38, 166, 156, 43, 45, 137, 87, 245, 177, 252, 75, 210, 87, 2, 206, 143, 207, 177, 148, 120, 106, 25, 106, 108, 94, 82, 163, 13, 25, 165, 229, 59, 76, 86, 228, 8, 212, 226, 186, 233, 14, 225, 52, 200, 128, 213, 30, 251, 208, 227, 200, 147, 24, 52, 158, 198, 171, 30, 159, 224, 91, 77, 172, 171, 4, 238, 44, 218, 171, 68, 209, 20, 72, 54, 230, 234, 105, 192, 148, 238, 162, 51, 157, 80, 195, 13, 80, 185, 133, 4, 253, 5, 214, 137, 80, 4, 173, 182, 170, 193, 133, 88, 92, 197, 67, 58, 19, 171, 27, 58, 79, 20, 196, 250, 234, 80, 34 ], "rct_signatures": { "type": 4, "txnFee": 100990000, "ecdhInfo": [ { "amount": "6500d18e417347b5" }, { "amount": "2a31661b788c06c1" }, { "amount": "476a9b09b09259b1" }, { "amount": "3f92620df3ac7248" }, { "amount": "dc94ebed29dfe31d" }, { "amount": "aaea6ca4b1e29d61" }, { "amount": "95b749b8bdd406c2" }, { "amount": "5e1e66c17ddcdf74" }, { "amount": "722575696ded0659" }, { "amount": "02d4f7ef3c26aca6" }, { "amount": "eff847259cd6684e" }], "outPk": [ "6171546031e689809f6f251d6603890b6389ab88c7939cabeba06faf2908407b", "89d248e8147b733255bbc93175aea3b7fe1fbc49ee390ed6078a2812abbcdefa", "14de5e905a70f188a5b6d81ce6017eae63e5cf008ccc528e2a6e5cd8a16b6ef7", "3ff527dc2625a627c2bc9b8c7fe558eda601c610a302c0426dd9b4f334328d3a", "fba3397826b1cf8f9b95657b51f919e95e6233126ac3d48c3cefdb3b2fdd6c3e", "1c6ef1ad768c641910f3d66b96cb84129f5827aed335cf309469109012dea4eb", "33abc693a53459acdd2baf25c09550c4816ce82355783b8a2c57e9d1965c3a73", "9bbb0c74a5341b93cad10f0a3b31c3331deba980ec0f6beb0e9368584435d792", "6c56767171986bdcff29a50c8b90945ecc1be658b400df300c6d1c8ab37b004e", "134d946f9ae12e97e1539780c9636b66c3422f84693da553cf421d9e0ada1bde", "984b0d1d09308e261158b96ede707b9fa1fec99da8e4f0ed11481d763fa72774"] }, "rctsig_prunable": { "nbp": 1, "bp": [ { "A": "ccb6c3e01712c58e7d5d858b983f2b25aec41cb0e084920b8f18ca135fbc9f17", "S": "e60647902bc9542c2fd1638bdf7ffa10207488732ced2d84e428e5a59ea73046", "T1": "ecd3e5b7163e9ca115457a63054c3e133e1ec3fbf8289fe1d6c0cb944c1c9a87", "T2": "4a52a6558c8e31004103d04b8a6a18afe6d33d67373c05f4c9a1a024f359eed0", "taux": "13186ea4709d8b5e0a0c6f84c39cff11e902fe18a10f96700ab5a657f230b705", "mu": "00e089f1f6a3c68d5eba0fc24ebe18a3a0812d0df9b82254bf35692faba48b0a", "L": [ "4627c94aea8de783e09033a56562e9cb551ef98451bcae44d24d6503cccf118d", "bb3f27ec8690ca9e0df95f2ce06126ae0884a7da0ff1ba2c0b5f95552e7115af", "4cdc59b4465392ab8ab1649368f6bcff8cb9b7cb156b15ec9f5a0c11937087fb", "1f69fece221d3baeb455859562667b39415414dbc17661bc4f074eb1352fd56d", "6e1b421d60e506374d9a456685bad72ca6e93150d4c275610c95a5ff421bb5bc", "8aeb5a3ea1ed37d34054d7edc91e69c44766339d41aef352fd9bbb78e67694ac", "df475a8078e652a382af0686f71cce722257f61f1073b513f03af76a69220a1c", "17f3bd3cdd6fe1a953c7e661a55dce575382cbe252fbaf133dae6f49ed5c3f6b", "76a6998af7d35a667a491edb50f027af45e6c7d0c2a277764d217e9d1c01baf7", "a1d19fb5f66439671f5ce2cdbaefea3afb3e97b86a2f3ae1732a75475a9b40fa" ], "R": [ "3d16317268daeb40425c7486bd3667cf97c1b3f5ba0540ebfc1205e9830866bd", "d11cd986c1ad777a0a748ebc0418a1533becdd7dd5bc9fb092a5da48c892f49d", "242003ab1f37ab48da9a714faf107f22f127316aa28926ed393030fa0cc4e20b", "5630a3f85ca1cc34791e11cf1d1c0875b8b35e7af6d13b2e5cf410770a6d1561", "f5333dffea192686d323ef085f34d79b5614800fc4b018446bfa5cdac58fe28f", "c827813eed5a57051570a8960dcdc8418a00fab9301b9d82934c94e1cfac5b7f", "cf7449a27a63254b76cba69e19e75ac7e670794cb93763776c4dfb30b6efab49", "cbb17e70e2d16b5e7e7253d28b55df455a536a772e6438a8cc869ead91a232a6", "1d3fb992ef8511c7bff1cf08641ae6a8f1d9c292ee935ee0a04a072905f6c7d2", "30450084313d7e6fa1891f6c46e63367fd79104c3ab552d35f25807698b01713" ], "a": "1668fbb1194fc11f932b018da73bef1b9f3bc715c1ee56506625c8bee0cfc504", "b": "c0d3ae8e581823e4c0f9525d47fe270d6b27a95a327a28ea1f1401cb61bc6b00", "t": "577e254a7edfba4a668000f844958e8aa9801b3660c3f15900abb7963feccb04" } ], "MGs": [ { "ss": [ [ "a6504da18663d665be91b1d00c34a6c95a1c97358394bbc520aa9de5f7473207", "f74af547b653b06b1f69fe09d3fee503db1bf8bf9f893e4e013b6db2ea67ab06"], [ "1f29ba392ed089b70a41007353302dd349fbc72218a7990c58cf4891248a6406", "e121b9473d1682df5098640cfbe2c060ca1171feb2e875bde735ce63a516ba0f"], [ "855f3e668f471c910bb4e3d6816d0ea56dcf6882afc28a587de888a71475ed0f", "2040ef3280953e8e1a18186e881122ee661c7f3bc4d0c10ba05adfb657013d0a"], [ "618231e6513a1b391735266b4f1c70d8bb9c1ad526b5fd63b7263921a1dc7f09", "291be78f8f6c8cb4af09c3b9b3c920d1757b8e5863496ec7d8e64e99809e5208"], [ "6aab3be71c45b55802452fb35a9f62975ac891a79ab4cf46eaec1a84269a930f", "f16a54ba58f78f9789aa5dbff237231f3166f496a973dab0bf8a0685f2333b03"], [ "db2ad813f607bcbc4623da1fe497f773a6b308cef881ffc436659b7bd2a9760a", "7a68ae4526c113aa4bc8f8db771a3d3e6cb48f140ef91f01637cbc6fc8c6d909"], [ "939e449268b303327be11ba584e460ea869fd238a3045c25ff1f1d5b34c2c601", "d8767fda0c504562f67ed12c3045f4b7179c3c1d2a54753e394937a4aef95408"], [ "c643b57137f8809e28d9433de4c86adcf7edbec5f15b44eee2866d7ff7c79007", "3b5fed61ffabdc84c5a57028fba5f8c4d7d0ee5493ac2254f08ccdff694bc001"], [ "2031dafee12556b7f4699ce74fb9441704641953328e2fb44e8983e60b51190c", "09f154134ea744d7e473b1b1f76a8d7a3d78470fcb9f31d1395c3dee0b54860e"], [ "0e98c64153fbc22faeb2ddb46c434f61b5c7a9026f26ece5a838ae2b33a0c506", "7390347f4cfc932138d437350de2191e67d202e89d3faa8aa4e6353480a56a08"], [ "f32abca28fb645a6c2cfbd07de6ed8789746ac500d14d53a0a86b9611bea5c09", "5f64282aa4059bac28f1a73f1195ab6252661eaebdaa4e7045aab508fb449402"]], "cc": "bc6a5dbaf8c78a6f6419371fda821b33a36858d61370642528a86753fd6c440f" }, { "ss": [ [ "36de84958dab55dfa2f59a55e93563c5c0e3fdbf6c3935eff9cc16b95fb9cb06", "ce4f1861c84e6c06ad1ba7686c16181f8bb57d7ca3792b58cf0ee018543d0105"], [ "c43b72af9bf569b8625dbeceadcbf878ec555f8192adaef8a53701ad77c14e0e", "67c9e6d64b750b3e22ee2157327a21beef8ae6a2c7ac329aebb234f852495b0a"], [ "b068f871b0093a5a0fd6f656164203d59833488b1773be6ea1d54d9cf8ded403", "4df69e82e4df988cc9466b2642baeb3297d4c5ad412a9aa80d24e5c1314c4e0e"], [ "768f8f20a11fcc341d41510c67964725ffd5ff690724620ded65f290732ef90b", "4b3ea8d0a9c06dccba55158b85c1dc969629656e67e36b54a8b44f7ce4f8a101"], [ "870985008866dc8d138438346a346bb968a545bf08dd43adacf9ab28b1cc6a08", "a472ad5a152b7475e287eeb6b685d720a054569c47ea8867fba92e69a3ddeb07"], [ "c1051a2ead71e82aa93bd79ead1abaecbe7bdfcfb1ee36ebc33d9509fb6e8906", "e008cc8cc5ff616b163684214a1110252012673fd2d786861e8929d43f1e8b00"], [ "87a2959d79ecb9b5e277b361ebd0e8b95fd58154f5845427ed099719b2663708", "d10066a059f536f356c37719c13a7e6f95d1004b97f1d29ab9b7867ccebd2800"], [ "cdf8f6883f07d24440205204774a30e10429fcc211b682139cfe4b50393f2e02", "f4dd9851592c82feb0cc4138c246e4351f436053fc3a6f21d1e12815d4904d01"], [ "e5133e1acb8ba936e90620388c25aed5194d14760ccba6dff2ed10e5d5da4d04", "fa425654c143c26b8fc497ca4f58359533e17c1fbf722f45603076388cb4cf02"], [ "db4a76d8bb8565c91719a878d96e4ba066605a0662f0282cdeae358538ecc60f", "226df6562f28e597cf78a054bba77d9f7408142e16ec5a5163e153480e1c1905"], [ "ffb9685ed13c27642f0bab9d4b12412a5c8a4c11e757ad3cd813ed579a825602", "9f4b85aa707243be58d93ac1fbb6ae68821775946f7c4716d974030af0cc7006"]], "cc": "53c09e3cf0555c5e27a648a8655fdd99fd659232111120f1da909f2bdf000407" }], "pseudoOuts": [ "a45b00a9019a6c4d5abd420aa96d4b5755524d5b2a5110c371d8797b07c4caa0", "f3f1f9440f301f83b9941ffa9e486a5461fea96cb2c7cadac8c192148a9a1fa4"] } }


Less details
source code | explorer version (api): master-2023-03-28-d669720 (1.2) | monero version: 0.18.2.2-eac1b86bb