Block at Slot 124137

Epoch:

3,879

Slot:

124,137

Status:

Proposed

Time:

2025-01-06 00:57:24 +0000 UTC ()

Proposer:

icelandcalling-node2

Block Root:

0xbb6dc9e690a34168b502dd62f8b45f8a76de792ba23053f1ad45569e0014ccc7

Parent Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

State Root:

0x4e38feb0fc4e3361d9939f1d674935bfa83c299bb4ec4c2cedab82223dd61e69

Signature:

0xb682acbd2cef00f8976c89bc8d511feaca815f9292d002f468f2f853ab3bae8a1407a0ab76644de8f3a64b9ded68e82016525af196a71f6247bfc8f4d6ba43f55e1ed4ca9d9ab191a5c70b627341c2b5b37c81d90b8d1b22736ecca131dfedb5

Randao Reveal:

0xb553c8b2b8be89cc3764abc0746d3085d4802b43be488f294d1a267e5981e40fa9d00dcdf60c6c54d27fd230a56d74010a878b14ad60437c8a33e38751fbd764c143aa69e8ebee5c217f54dd86a43f89c59cd40eab89f6f3ade179e68322c07c

Graffiti:

0x42793a20526f636b657420506f6f6c0000000000000000000000000000000000

Hex UTF-8

Eth 1 Data:

Block Hash:

0x1f21bf6cb47aa3e0ddc29dbbbb996b05cb7eeb0f53d88881c076e8a1006475e9

Deposit Count:

3,002

Deposit Root:

0x08c9248b85842304ca5bf554909ab96a72a04a2ebb99355dbd479df2cc2622fc

Sync Aggregate:

Participation:

91.41 %

Bits:

11110111 11111111 11111101 11011111 01111111 11111111 11011101 11111111
11111111 11111111 11111011 11111111 11111111 01111111 11110111 11111111
11111111 11101111 11111011 11111011 11111101 01111111 11101111 11111101
10111111 11111111 11110111 11011111 11011111 11011101 01111111 11010111
10111111 11111011 11011110 11111111 11111111 11111111 11111111 11111010
11111111 11111111 11111110 11111110 11111111 11111111 11111101 11111111
11111111 11110111 10111111 01111111 11111110 01111111 11110101 11111111
11111111 11111110 11111111 11111111 11101111 11111111 11111111 11111101

Signature:

0xae091dcbcfd446f5f2393fb20a698ec315883023912ddaa42510d781627925e2936831e132a77e5190feef2cea3824ae13b44076467fa2686cd36c0c4ec6b36fb5097f6ead080a648790bb0fa97d2c762324dff5133dccbeeb675c51eba0a5bc

Execution Payload:

Parent Hash:

0xe8ba724dc97769b9a99c3de4693cdde4962359ae554dae7ab181fff10ff6a1ea

Fee recipient:

State Root:

0x5948a43afed510b08b1d5b99049ab06461eee6af71014ff94c8a419e2331fda6

Receipt Root:

Logs Bloom:

0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Block Randomness

Block Number:

115262

Gas Limit:

30000000

Gas Used:

Timestamp:

1736125044

2025-01-06 00:57:24 +0000 UTC ()

Block Extra Data

0x4e65746865726d696e64

Base fee per gas:

Block Hash:

0x92b16a92bb0c549818856934ff872b00186f139b91ad5e478b7911ecad6d23b5

Transactions:

Attestations:

Votes:

888

Voting Validators:

888

Voluntary Exits:

Slashings:

0 attester & 0 proposer slashings

Deposits:

Showing 14 Attestations

Attestation 0

Slot:

124136

Committee Index:

Aggregation Bits:

11011111 11101111 11111111 11111111 11111111 11111101 11111111 1111011
11111111 11111111 11111111 11011111 11111111 11111011 11011111 1111111
11111111 1

Validators:

15506 25372 12983 3556 25745 26733 19894 17749 9540 16512 15693 3073 13742 20803 2914 5183 28033 27044 5304 9469 9019 15271 27221 20585 22635 23173 17697 25640 8836 28234 21947 1054 13072 17312 23080 29204 17147 4378 12856 10895 28937 15158 29711 18187 1397 8512 8120 9239 7865 9511 11609 1003 22715 30347 16574 6150 2088 20375 13342 1162 30414 19837 5180 9783 26039 2191 26495 16362 2502 14526 27816 14758 25973 26349 1631 4319 18432 5253 15509 5740 22857 3920 29493 5527 9898 28997 5488 20025 4096 18816 18850 1888 30458 27715 23241 21415 5694 14435 25914 14179 4221 2644 28677 9412 30313 7639 30079 5406 18697 17163 23043 30297 23163 7390 8961 29005 22482 12305 24092 19850 22095 16527 25232 5230 14844 20316 14664 12805 6825 23584

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0x98f0fccbb6eaac42538a6ba65d9327856a5391a7443222c940b03741f6a40167c8427e8706a59cb8f26f558fb48af5b314cc5b57633e38f28b64792ffa609b139248006d88d74d28bbcedf7d0c93844e4c7d1266893155de001cf23712cb7120

Attestation 1

Slot:

124136

Committee Index:

Aggregation Bits:

11101111 11111111 00111111 11111011 11111111 11111111 11111111 1111111
11111111 11111111 11111111 11101111 11101111 11111011 11111111 1111111
11111111 1

Validators:

13052 30569 10508 5483 18972 21312 28443 20345 14259 20353 19581 8365 4128 17768 10582 22039 15941 15957 17086 28336 15486 26805 28719 8531 1190 20612 28345 5916 20325 2699 10526 5197 7365 17307 26454 22078 27894 13351 18991 11003 10919 5068 14404 27377 4326 15174 28634 18167 27938 11617 9950 12191 22749 16030 11162 27577 11571 22685 5542 16963 16611 22729 16931 7485 7073 19663 3947 4386 6976 19372 16568 14118 19564 17194 11291 27918 4640 25542 12230 23759 28134 26958 25903 13902 7583 8592 1770 21517 9017 3748 27143 16464 4377 18528 12955 5192 4877 8479 27584 29337 21665 6061 16532 29310 18917 2642 1790 20296 8596 29638 29166 2438 1411 2741 9035 18725 5438 29992 2066 21293 20251 22393 30126 13401 3762 9230 3515 7551 11294 27268

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0xa756bf6a3ddaea27d6a77921bd04c5b2a6b476b76af7b82a4683449374010a1aafe22f1a3df69219b032e441c4ea726e11ff9088e11e8ec8ca6ad1b8a4524b781f02e7741091b058066e5875ed5bafedb14f5c9276e49bf75721c130fc1b71e7

Attestation 2

Slot:

124136

Committee Index:

Aggregation Bits:

11111111 11111111 11111111 11111111 11111111 11111111 11111111 1111101
10111111 10111111 11111111 11111111 11111001 11111111 11101111 1111111
11111110 1

Validators:

26985 26604 4393 26424 12998 23852 26425 2746 17949 4761 19355 12740 6539 10164 30637 17216 27235 28954 5378 18544 4787 28881 1892 21264 26602 17897 11323 5745 10129 11856 11876 26220 22380 8796 22820 9173 12891 13480 1418 8686 3283 30128 16884 11681 2134 12186 10694 18648 21954 6475 20441 15254 6867 19421 9419 8944 4992 5089 15188 28087 14982 7157 5522 8390 20990 16795 2261 21813 26332 25887 16940 1855 18843 2282 30571 13970 16912 4482 16772 15374 8661 8323 17032 18767 23156 6429 28729 22397 11651 21725 17570 7590 26682 13453 1923 2870 21474 10739 14302 17623 21637 23417 3914 2908 15791 25622 10179 1227 29820 16744 2667 14553 19703 16777 22399 23560 14428 6951 28185 8316 2154 17237 18368 18337 8658 26993 4660 29887 17012 10039

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0xafc38b0900b83388ae0c31fc722e8f6287d7d2adec2d1cc7fdfc5baf110a8154904fd36b0d6f08d2f279ca316438b01807298d492f0bb6996b45c46b0fbb31ac9e2427d934b5c0e97f764abfa73fc768d4803b054451a16983f7a7222831ecf8

Attestation 3

Slot:

124136

Committee Index:

Aggregation Bits:

11111111 11111111 11111111 01111101 11110011 11110111 01111101 1111101
11111111 11111111 11110111 11111101 11111111 11111111 11111111 1111111
11111111 1

Validators:

12931 2595 1401 6555 26508 8699 18436 21026 7164 20090 17781 21409 5476 22515 1496 17973 19538 9296 13567 23972 6322 5751 8942 10916 4436 7993 10737 19702 14050 5076 8946 25694 20114 16897 14379 8609 7495 28291 23641 3912 21109 6708 19530 2476 1369 12536 30094 17667 6908 22998 25614 19830 17069 1797 10567 20183 28123 6655 15462 8998 26119 28631 10592 28744 5941 17559 20976 1310 16645 21410 4843 29741 29658 1122 30587 3119 11277 12364 16041 25959 26829 17445 30060 28457 10962 13425 17035 1599 1558 1841 13724 7962 14530 14865 1448 19045 25333 5991 26399 27327 7568 12905 22881 18558 27734 8226 9982 4327 4519 10746 3583 29571 7601 28323 30645 10627 6347 27167 8074 21920 30513 6662 23640 28950 1358 17097 1973

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0xa8a1436b23ca77d763cfd4a22dbb5562fdfd6dce13d0cdee42651ab397b8cdd444ed5f324f5353e239570e365a616d3e155ffc85a823c26f0d7b8ce70c3dd5b34159497456ca5de3ca88a8715d18f7c8e749468c5185f2f512e6100381d6d6e4

Attestation 4

Slot:

124136

Committee Index:

Aggregation Bits:

11111111 11111111 00111111 11111111 11111111 11011111 11110011 1111111
11111111 11111111 11011111 11101111 11111111 11111111 11111101 1111111
01111011 1

Validators:

6522 19746 5870 7718 3818 5959 3247 18439 16164 10302 3085 5143 16067 19057 10877 20509 6551 3668 20798 4220 8965 25455 15411 2867 23865 16406 23539 25122 2943 9376 5931 12798 27944 11582 20365 17621 21056 18963 19416 13578 20303 4755 26555 12693 17328 27093 11218 20619 9262 18140 16246 25613 8565 1179 11870 18137 19408 3696 23246 10624 21438 20586 19009 29627 13477 27358 18024 10564 4320 28407 7029 22194 18214 8665 22221 9317 28109 17217 17120 22774 15891 12481 9587 14890 19289 30469 23206 18373 27116 10816 18010 3193 17346 30309 7250 12727 23382 15811 20276 16191 7046 24023 16576 15538 2406 11926 27979 14629 27145 25772 12662 5202 21817 6106 17802 26556 5225 11253 1909 25504 30653 14943 17423 19719 28439 6421 16382

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0x94ecf5bc4e952c198a1a84d263231556fe860e5344eb3169862fa5fb90433478da5c58f8162177cf6b3b10a5ff52a95504d89f96ecc711ac0798c79792a4d7e2b1e841078d630750059a1569c388eea3d2932f17415f2b2789bae03d365c37e1

Attestation 5

Slot:

124136

Committee Index:

Aggregation Bits:

11011111 11111111 11111111 11110011 11111111 11111111 11111110 1111111
11101111 11111111 11111111 11110111 11111111 11101111 10110111 1111111
10111111 1

Validators:

5085 30471 19070 2599 18969 4890 17178 7742 13532 10751 14393 10678 2664 4439 16981 29461 30424 8745 19971 23571 20126 4240 13738 3660 2272 10087 15066 11534 14973 10930 9826 29183 21951 23312 7555 9005 2459 15247 11286 18204 5503 1829 1063 22710 14307 25972 25882 21374 28877 25650 16082 17046 7259 19966 30230 29557 4714 17584 25865 6524 11861 1408 13358 7562 25558 16934 22066 13904 11579 30470 26493 8940 25987 22954 14332 15894 20153 9037 12616 18909 13978 15795 1350 5535 21020 18768 4075 7437 9347 10218 20435 10506 12273 11278 26510 26939 20705 2640 27968 9850 1943 8523 28572 18477 12133 7428 29700 4700 17168 10514 23196 17790 28155 18257 2631 7087 6732 22494 1083 12645 6034 10007 29964 7367 25770 16933 2089

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0xa7aff5aced11fc351f39030c0514978e40191134a890821b37de0544c12744a016c59edbe9f5990791b3a6972ed9681410716ad4866dfd4eb42c14c705e19a6784f73b765f80995e69e9f49ac7c62ae40d47904dad7fa1659c265eecd44e899c

Attestation 6

Slot:

124136

Committee Index:

Aggregation Bits:

11101011 11111111 01101111 11011011 11111111 11011111 11111110 1111111
10111111 01110111 11011111 11111110 11011111 11111111 11111111 111111
11001111 0

Validators:

12657 14876 18265 9572 4241 6181 18235 28918 5109 6486 16898 10897 10098 30584 22488 22057 5888 9821 19136 17103 28926 27567 21999 8249 20981 25735 8153 1974 4909 29027 12023 3503 30081 22660 26286 21754 8737 28239 6253 23286 13928 27007 20372 18897 8979 16215 8255 21008 10141 20769 27908 21605 25733 7421 14728 9551 7978 21318 4397 18496 3311 1197 5686 11639 14280 17549 22483 29727 19082 23459 22794 11958 15002 17164 3308 17264 7956 8455 11221 23084 21631 14305 22646 21355 7413 13316 1334 8256 16261 27827 10665 1535 10784 6375 3486 9887 23695 2061 27605 9996 21582 13937 10839 29163 2149 23503 19025 13981 19901 1505 3437 28805 25465 3568 6329 13569 10758 29014 28995

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0xad2b91287b55960c6ac7033bd092b7096bf4e1295f14df6fa215442e35603097e8c17c9a824ec85e95c3d8e827f0d83d14288d40683a340e1349f4f4ed83054cf00efb20c8e738db5224560d661335e674f68352a21fed11eec96134dd22f5b1

Attestation 7

Slot:

124136

Committee Index:

Aggregation Bits:

00000000 01010000 00001101 00010001 00001000 10000001 00000000 0
00100000 10000001 01000100 01000000 10000010 00000000 00000001 0
00000000 0

Validators:

13532 14393 23571 20126 13738 15066 14973 23312 15247 14307 13358 13904 14332 20153 13978 21020 20435 20705 23196

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0x905259a50193f1faca4967c4602b95915a0b01b5f59bab304c80ece88f3c7533753e9ef8f915da5f726eafdd8d8ee32b198589ce15204cd2beee869f744c8afbe7db32781355f2030fcba35972fb82bc07499fbf6037ce42f05fac354e18252b

Attestation 8

Slot:

124136

Committee Index:

Aggregation Bits:

00000100 00000000 00000000 00000000 00000100 00000000 00010000 001
00000000 00000010 00100001 00000000 10000001 00100000 00000100 01
00000000 0

Validators:

23852 13480 15254 15188 14982 13970 15374 23156 13453 14302 23417 14553 23560 14428

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0x947c39d5442bf10916080d78a388f2fb912fe43ef3126f28cee12224e958705d43606003b41bd2b663f46d1ace01226f03bc0cffaabebb9df8348be1d9384324c880f34da7ac88b37fa7011de8ba5f1237f75692170c56f2d5a45f561231cfda

Attestation 9

Slot:

124136

Committee Index:

Aggregation Bits:

00000001 00000000 00000000 00000000 00100000 01000000 00000000 0
10000101 00100000 10000000 00001000 00000000 00000000 00100000 01
00000100 0

Validators:

21026 20114 28291 20183 28123 28631 28744 20976 29658 28457 27734 29571 28323 28950

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0x833b2b7f1c854fe50b24ca1b8f0df8213e075fde7feed461efc39cd8ec0efcdcb13759bc4ea609ac306196841ef6fb9005a0568a6daaabecfc1d3a8d6115e69b93218366b89e9d3b8e9b80af42daf5c1c7e5c8a48b61d9245176b9bdee9dd9e2

Attestation 10

Slot:

124136

Committee Index:

Aggregation Bits:

01000000 00000000 00000000 00000010 00000000 00000001 01000010 01
00000000 00100000 00001000 00000100 00010000 00000000 00010000 0
00001000 0

Validators:

14876 20981 13928 20372 21008 20769 14728 14280 15002 14305 13316 13937 13981 13569

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0x8204558f84fdfcf2cb98d547f93287990c152ba5a326bbbf4e44bc31bbd6051bdd7f27da11b8544fe419c3d6778d5f9403c4e383498aff8ad52970bd9fe89384cc1eaee10dde63f9b4032d98800368b87de9bfd7f1b8b121281fa97e9cd37f53

Attestation 11

Slot:

124136

Committee Index:

Aggregation Bits:

00000000 00000001 00000000 01010000 00000000 00000000 00000000 0
00000000 00000000 00000000 00000000 00010000 00000000 00000001 0
00001000 1

Validators:

20803 20585 23173 20375 23241 23163 24092 20316 23584

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0x97ab63d082cc062052e224be13e27128427aad0e182a284212e4125f399fade627dd95dd5846c37d3bd8f7148f154e39176e9ef31d5d2817f7ac9f5eea79b30296cb3138632d87679b49edd2a5a19021051448105a6af2d47e1482dbb035e826

Attestation 12

Slot:

124136

Committee Index:

Aggregation Bits:

00000000 01000000 00000001 00000000 00000000 01000010 01000000 0
00000000 00010000 00000001 00000000 00000000 00000000 00000000 0
00100000 0

Validators:

14259 15486 13351 14404 15174 14118 13902 13401

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0x8b54c8a9eafadeddbe2eca302389da9220b7d653de0da62b81174d1d4b67be9735783ea419a62da25738e69441c57c890fb9ff864d8c39a6a8313f89d684af24a0e86f8fac19b7e62591e74805eaacc228bee533f1253f35fabd1ea7de8d76b6

Attestation 13

Slot:

124136

Committee Index:

Aggregation Bits:

00000000 00000000 00000100 00000000 00000000 00000000 00000000 0
00000000 00000000 01000000 01000000 10000010 00000000 00000000 0
00000000 0

Validators:

20126 20153 21020 20435 20705

Beacon Block Root:

0x91e70bb4394acaea68df0dc14c522572f540aa36427cc59f1cebf81ff2d956e7

Source:

Epoch 3878 (0x55fdbd5d80d335e9d505a7a6fbca6c1bcf5ea11395fcd4184ca6a5d9cca250b8)

Target:

Epoch 3879 (0x0ed17859767d45b6c9fa746615299edec6537971beac648d593a010ef9899306)

Signature:

0xa01df6dc81a6b90c451ed51fd594eab7fcf57ae4fad629f4a9f10239a1cf4103da7905dc95052a2fc452accc58b779690c3d2abdac181d3f70d0ab48ed4fe51838a1d88a1696eec474ef916c5604a94ce76bbff83f21046010f91944369b7cec